If your shotgun is not listed, we do not make an extension that fits it.
Tube Lengths
MXT 12ga Tube Lengths
Measurements based on the length of the extension tube, as shown in the table below, should be taken from the front of the factory magazine with the magazine cap removed. Any extension extending past the muzzle will experience fouling build-up and finish wear/damage; extensions may extend up to 18″ beyond the muzzle (any resulting wear or damage is not covered by warranty).
The extension tube cap will add approximately .200″ to the length of the extension tube.
All MXT tube kits are for 12 gauge shotguns only. MXT tubes have an outside diameter of 1.060″, and are machined from 6000-series aluminum with a matte black anodized finish.
| EXTENSION CAPACITY | OVERALL LENGTH | NOTES |
|---|---|---|
| +1 | 2.66″ | Integral cap, no clamp groove |
| +2 | 5.00″ | |
| +3 | 7.52″ | |
| +3B | 8.35″ | Designed for flush fit on 18.5″ Benelli autos |
| +4 | 9.80″ | |
| +5B | 10.83″ | Designed for flush fit on 21″ Benelli autos |
| +5 | 11.60″ | |
| +6 | 14.00″ | |
| +7B | 15.75″ | Designed to fit closer to muzzle on 26″ Benelli autos |
| +7 | 16.50″ | |
| +8B | 18.35″ | Designed to fit closer to muzzle on 28″ Benelli autos |
| +8 | 19.09″ | |
| +9 | 21.50″ |
20ga Tube Lengths
Measurements based on the length of the extension tube, as shown in the table below, should be taken from the front of the factory magazine with the magazine cap removed. Any extension extending past the muzzle will experience fouling build-up and finish wear/damage; extensions may extend up to 18″ beyond the muzzle (any resulting wear or damage is not covered by warranty).
The extension tube cap will add approximately .200″ to the length of the extension tube.
20ga extension tubes have an outside diameter of 1.003″, and are machined from 6000-series aluminum with a matte black anodized finish.
| EXTENSION CAPACITY | OVERALL LENGTH | NOTES |
|---|---|---|
| +4 | 9.29″ | |
| +5 | 10.83″ | |
| +6 | 13.27″ | |
| +7 | 16.50″ |
Benelli
M1, M2, SBE 1/2/3
FACTORY CAPACITY: 3 rounds
MXT EXTENSION NUT: NUT-BN-12-00 (NUT-BN-20-00 – 20ga)
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 18.5″ | +3 | .750″ short of muzzle |
| 18.5″ | +3B | Flush fit to muzzle |
| 21″ | +4 | 1″ short of muzzle |
| 21″ | +5 | .750″ past muzzle |
| 24″ | +6 | Flush fit to muzzle |
| 26″ | +7 | .500″ past muzzle |
| 28″ | +7 | 1.500″ short of muzzle |
| 28″ | +8 | 1″ past muzzle |
ACCESSORIES
| Bolt handle | BOH-BFB (see notes), BOH-BN, BOH-VM |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
NOTES
The BOH-BFB bolt handles requires the current version of the Benelli bolt with the oblong anti-rotation cutout around the bolt handle hole. Older Benellis without this cutout are compatible only with BOH-BN and BOH-VM.
M4
The commercially-available M4 comes with a 5-round limited magazine from the factory. Nordic Components does not produce a compatible extension to bring the magazine to its 7-round full capacity. We recommend Dave’s Metal Works for the components required to bring the M4 to 7-round capacity (all 922(r) rules apply).
The M4 with a 7-round magazine will accept our BR extension tube nut (NUT-BR-12-00); this will allow any MXT extension kit to be used to add to the 7-round capacity.
Nova/Supernova
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-BR-12-00 (NUT-BR-20-00 – 20ga)
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 18″ | +2 | .500″ past muzzle |
| 24″ | +4 | .750″ short of muzzle |
| 24″ | +5 | 1.500″ past muzzle |
| 26″ | +5 | .500 short of muzzle |
| 28″ | +6 | .125″ short of muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Heavy-walled/Mossberg (BCL-12-MB or BCT-12-MB) |
| Follower | Nova/Vinci (FOL-VN-12-00) |
Vinci/Super Vinci
FACTORY CAPACITY: 3 rounds
MXT EXTENSION NUT: NUT-VINCI-12-ASM
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 18″ | +3 | 1″ short of muzzle |
| 24″ | +6 | Flush fit to muzzle |
| 26″ | +7 | .500″ past muzzle |
| 28″ | +8 | .625″ past muzzle |
| 30″ | +8 | 1.125″ short of muzzle |
| 30″ | +9 | 1.500″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Heavy-walled/Mossberg (BCL-12-MB or BCT-12-MB) |
| Follower | Nova/Vinci (FOL-VN-12-00) |
NOTES
Due to the angle of the magazine tube channel in the Vinci/Super Vinci forearm, a barrel clamp is required for use of any extension longer than a +4.
Cordoba, Ethos, Montefeltro, Sport II, Ultralight
Due to the design of the gas system and magazine cap interface, these shotguns are not capable of accepting a magazine extension.
Beretta
AL391 Xtrema/Xtrema2, A350 Outlander, A400 Xtreme/Xtreme Plus
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-BR-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 24″ | +4 | Flush fit to muzzle |
| 26″ | +5 | Flush fit to muzzle |
| 28″ | +6 | .500″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
1301 Comp/Tactical
FACTORY CAPACITY: 5 rounds (after removing spring retainer)
MXT EXTENSION NUT: NUT-BR-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 18.5″ (Tactical) | +2 – 1301 Tactical Package | Flush fit to muzzle – see notes |
| 21″ | +3 | .625″ past muzzle |
| 24″ | +4 | .125″ short of muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12); Tactical uses BCL- or BCT-BR1301-TAC |
| Follower | Standard (FOL-SG-12-00) |
NOTES
Nordic Components offers a dedicated package for the Beretta 1301 Tactical, featuring a custom-designed +2 extension tube for a flush fit to the shotgun’s muzzle.
If your 1301 Tactical has a factory extension, like the one below, you cannot utilize our system.
A300 Outlander, AL391 Urika/Teknys, A400 Xcel/Xplor
Due to the design of the gas system and magazine cap interface, these shotguns are not capable of accepting a magazine extension.
Breda
B12 Series, B3.5, 930I
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-BN-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 18.5″ (Tactical) | +2 | Flush fit to muzzle |
| 21″ | +3 | .625″ past muzzle |
| 24″ | +4 | .125″ short of muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12); Tactical uses BCL- or BCT-BR1301-TAC |
| Follower | Standard (FOL-SG-12-00) |
NOTES
Pre-2018 930i shotguns are not capable of accepting a magazine extension.
Browning
Auto-5 (Old Production)
FACTORY CAPACITY: 5 rounds
MXT EXTENSION NUT: NUT-BP-12-00 (see notes)
We do not have a measurements chart for this shotgun. Please use the information under TUBE LENGTHS to determine the desired tube length and capacity.
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | See Notes |
| Follower | N/A |
NOTES
The magazine cap thread specifications changed many times over the course of the Auto-5’s production run. If NUT-BP-12-00 does not fit your Auto-5, it is possible NUT-RM-12-00 will fit. If neither of these nuts fit your shotgun, then we do not have a compatible extension nut.
The Browning Auto-5, like all long-recoil operation shotguns, is NOT COMPATIBLE with a barrel clamp. Installation of a barrel clamp on this type of shotgun may cause permanent damage to the firearm.
A5 (New Production)
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-NA5-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 26″ | +6 | Flush fit to muzzle |
| 28″ | +7B | .250″ short of muzzle |
| 30″ | +8B | .250″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
BPS
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-BP-12-00
We do not have a measurements chart for this shotgun. Please use the information under TUBE LENGTHS to determine the desired tube length and capacity.
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) – See notes |
NOTES
Early models of the BPS shotgun have a rolled crimp at the end of the magazine tube. For installation of any magazine extension or a Nordic follower, this crimp will need to be removed — please consult with a gunsmith before attempting installation of an extension or follower replacement.
Gold/Silver
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-SX-12-00 (NUT-BG-20-00 – 20ga)
We do not have a measurements chart for this shotgun. Please use the information under TUBE LENGTHS to determine the desired tube length and capacity.
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) – See notes |
NOTES
Due to shell stop tension conflicts, we do not recommend use of an extension larger than a +4 on the Browning Gold.
Extensions are compatible only with 12 gauge versions of the Browning Gold. We do not have any extensions compatible with the 10 gauge Gold.
CZ
612/712/912
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-BR-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 20″ | +3 | .625″ past muzzle |
| 26″ | +5 | 1.350″ short of muzzle |
| 26″ | +6 | 1.150″ past muzzle |
| 28″ | +6 | .850″ short of muzzle |
| 28″ | +7 | 1.625″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) – see notes |
NOTES
Certain early 612/712 shotguns are not compatible with Nordic Components followers.
FN
SLP
FACTORY CAPACITY: 6 or 8 rounds (varies by model)
MXT EXTENSION NUT: NUT-SX-12-00
NOTES
Because all SLP models have a full-length magazine from the factory, any MXT extension will extend past the muzzle in entirety. We recommend extending no more than 18″ past the muzzle.
| EXTENSION LENGTHS WITH SX NUT AND CAP | |
|---|---|
| +1 | 3.125″ |
| +2 | 5.6875″ |
| +3 | 8.1875″ |
| +4 | 10.4475″ |
| +5 | 12.27″ |
| +6 | 14.6675″ |
| +7 | 17.1875″ |
| +8 | 19.75″ |
| +9 | 22.1875″ |
ACCESSORIES
| Bolt handle | BOH-SX |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
FN Auto-5
FACTORY CAPACITY: 5 rounds
MXT EXTENSION NUT: NUT-BP-12-00 (see notes)
We do not have a measurements chart for this shotgun. Please use the information under TUBE LENGTHS to determine the desired tube length and capacity.
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | See Notes |
| Follower | N/A |
NOTES
The magazine cap thread specifications changed many times over the course of the Auto-5’s production run. If NUT-BP-12-00 does not fit your Auto-5, it is possible NUT-RM-12-00 will fit. If neither of these nuts fit your shotgun, then we do not have a compatible extension nut.
The FN Auto-5, like all long-recoil operation shotguns, is NOT COMPATIBLE with a barrel clamp. Installation of a barrel clamp on this type of shotgun may cause permanent damage to the firearm.
P-12
FACTORY CAPACITY: 5 rounds
MXT EXTENSION NUT: NUT-WIN-120-00 (see notes)
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 18″ | +1 | Flush fit to muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
Franchi
Affinity/Affinity 3.5/Intensity/612/912
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-ST-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 26″ | +6 | .500″ past muzzle |
| 28″ | +6 | 1.500″ short of muzzle |
| 28″ | +7 | 1″ past muzzle |
| 30″ | +7 | 1″ short of muzzle |
| 30″ | +8 | 1.500″ past muzzle |
ACCESSORIES
Mossberg
500/535 (all versions), Maverick 88
NOTES
Due to the design of the barrel lug and the magazine cap interface, the Mossberg 500/535 and Maverick 88 cannot accept a magazine extension.
590/590A1
FACTORY CAPACITY: 6 (18.5″ barrel) or 8 (20″ barrel) rounds
MXT EXTENSION NUT: NUT-MB-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 18.5″ | +1 | 1″ past muzzle |
| 18.5″ | +2 | 2″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Heavy-walled (BCL-12-MB or BCT-12-MB) |
| Follower | Standard (FOL-SG-12-00) |
NOTES
Because the 20″ 590/590A1 models have a full-length magazine from the factory, any MXT extension will extend past the muzzle in entirety. We recommend extending no more than 18″ past the muzzle.
| EXTENSION LENGTHS WITH MB NUT AND CAP | |
|---|---|
| +1 | 3.125″ |
| +2 | 5.6875″ |
| +3 | 8.1875″ |
| +4 | 10.4475″ |
| +5 | 12.27″ |
| +6 | 14.6675″ |
| +7 | 17.1875″ |
| +8 | 19.75″ |
| +9 | 22.1875″ |
835
FACTORY CAPACITY: 5 rounds
MXT EXTENSION NUT: NUT-MB-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 24″ | +3 | 1.25″ short of muzzle |
| 24″ | +4 | 1″ past muzzle |
| 26″ | +4 | 1″ short of muzzle |
| 26″ | +5 | .750″ past muzzle |
| 28″ | +5 | 1.25″ short of muzzle |
| 28″ | +6 | 1.25″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Heavy-walled (BCL-12-MB or BCT-12-MB) |
| Follower | Standard (FOL-SG-12-00) |
NOTES
Because the 20″ 590/590A1 models have a full-length magazine from the factory, any MXT extension will extend past the muzzle in entirety. We recommend extending no more than 18″ past the muzzle.
| EXTENSION LENGTHS WITH MB NUT AND CAP | |
|---|---|
| +1 | 3.125″ |
| +2 | 5.6875″ |
| +3 | 8.1875″ |
| +4 | 10.4475″ |
| +5 | 12.27″ |
| +6 | 14.6675″ |
| +7 | 17.1875″ |
| +8 | 19.75″ |
| +9 | 22.1875″ |
930/940 (versions other than JM Pro)
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-MB-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 18.5″ | +2 | 1″ short of muzzle |
| 18.5″ | +3 | 1.500″ past muzzle |
| 22″ | +4 | .200″ past muzzle |
| 24″ | +5 | Flush fit to muzzle |
| 26″ | +6 | .500″ past muzzle |
| 28″ | +7 | 1.00″ past muzzle |
ACCESSORIES
| Bolt handle | BOH-MB |
| Barrel clamp | Standard (BCL-12 or BCT-12) EXCEPT 930SPX – requires heavy-walled clamp (BCL-12-MB) |
| Follower | Standard (FOL-SG-12-00) |
NOTES
The 930/940 shell stop can be very sensitive to magazine spring tension. We do not recommend using an HD spring in the 930.
930/940 JM Pro
FACTORY CAPACITY: The Mossberg 930/940 JM Pro Series shotguns come factory equipped with Nordic Components +4 (22″ barrel) or +5 (24″ barrel) magazine extensions. The capacity of the factory magazine without the extension is 4.
To expand the capacity of the JM Pro, the extension tube itself may be replaced with a different length, or an additional extension tube may be added with an MXT Coupler. The same extension nut and end cap may be reused, but a new spring will be required.
NOTE: Prior to 2016, Mossberg used our older EXT style extension tubes. These can be identified by the lack of a barrel clamp groove on the exterior of the extension tube. If your JM Pro has the older EXT tube, the existing extension nut can be reused, but a new end cap will be required if replacing the extension tube with a new MXT model. If using the MXT Coupler, the new MXT tube will have to connect to the extension nut; the existing EXT tube can be used attached to the coupler with the existing end cap.
The 930/940 shell stop can be very sensitive to magazine spring tension. We do not recommend using an HD spring in the 930.
Remington
870 (standard magazine)
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-MB-12-0NUT-RM-12-00 (NUT-RM-20-00 – 20ga)
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 14″ | MXT Plug Cap (adds 1) | Flush fit to muzzle |
| 14″ | +1 | 1.500″ past muzzle |
| 18.5″ | +2 | 1″ short of muzzle |
| 18.5″ | +3 | 1.500″ past muzzle |
| 20″ | +3 | Flush fit to muzzle |
| 22″ | +4 | .500″ past muzzle |
| 24″ | +5 | Flush fit to muzzle |
| 26″ | +6 | .500″ past muzzle |
| 28″ | +6 | 1.500″ short of muzzle |
| 28″ | +7 | 1″ past muzzle |
| 30″ | +7 | 1″ short of muzzle |
| 30″ | +8 | 1.875″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
870 (6-round magazine)
FACTORY CAPACITY: 6 rounds
MXT EXTENSION NUT: NUT-RM-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 18.5″ | +1 | 1.250″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
1100/11-87
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-RM-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 14″ | MXT Plug Cap (adds 1) | Flush fit to muzzle |
| 14″ | +1 | |
| 24″ | +5 | .250″ past muzzle |
| 26″ | +6 | .750″ past muzzle |
| 28″ | +6 | 1.250″ short of muzzle |
| 28″ | +7 | 1.250″ past muzzle |
| 30″ | +7 | .750″ short of muzzle |
| 30″ | +8 | 1.250″ past muzzle |
ACCESSORIES
| Bolt handle | BOH-RM |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
NOTES
The 930/940 shell stop can be very sensitive to magazine spring tension. We do not recommend using an HD spring in the 930.
Versa Max and V3 (all models except Tactical/Competition Tactical)
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-RM-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 22″ | +4 | Flush fit to muzzle |
| 24″ | +5 | Flush fit to muzzle |
| 26″ | +6 | .250″ past muzzle |
| 28″ | +7 | .750″ past muzzle |
ACCESSORIES
| Bolt handle | BOH-MB |
| Barrel clamp | Standard (BCL-12 or BCT-12) EXCEPT 930SPX – requires heavy-walled clamp (BCL-12-MB) |
| Follower | Standard (FOL-SG-12-00) |
NOTES
The 930/940 shell stop can be very sensitive to magazine spring tension. We do not recommend using an HD spring in the 930.
Versa Max Tactical
The Versa Max Tactical comes factory-equipped with a Nordic Components extension assembly. Capacity may be added by swapping out to a longer extension tube or adding an additional tube with the use of the MXT Coupler.
Versa Max Competition Tactical
The 2-round extension on the Competition Tactical can be replaced with our Mossberg extension nut (NUT-MB-12-00) and an MXT extension of any desired length.
Barrel clamps are not compatible with the factory magazine, due to the increased diameter of the carbon fiber sleeve.
Model 11
FACTORY CAPACITY: 5 rounds
MXT EXTENSION NUT: NUT-RM-12-00 (see notes)
We do not have a measurements chart for this shotgun. Please use the information under TUBE LENGTHS to determine the desired tube length and capacity.
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | See Notes |
| Follower | N/A |
NOTES
The magazine cap thread specifications changed many times over the course of the Model 11’s production run. If NUT-RM-12-00 does not fit your shotgun, it is possible NUT-BP-12-00 will fit. If neither of these nuts fit your shotgun, then we do not have a compatible extension nut.
The Model 11, like all long-recoil operation shotguns, is NOT COMPATIBLE with a barrel clamp. Installation of a barrel clamp on this type of shotgun may cause permanent damage to the firearm.
Retay
Masai Mara
Due to the design of the gas system and magazine cap interface, these shotguns are not capable of accepting a magazine extension.
Stevens
320
FACTORY CAPACITY: 5 rounds
MXT EXTENSION NUT: NUT-WIN-120
We do not have measurements for this shotgun. Please use the information under TUBE LENGTHS to determine the desired tube length and capacity.
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
Stoeger
M2000
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-ST-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 24″ | +5 | Fluch fit to muzzle |
| 26″ | +6 | .500″ past muzzle |
| 28″ | +7 | 1.00″ past muzzle |
ACCESSORIES
| Bolt handle | BOH-BFB, BOH-BN, BOH-VM |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
NOTES
Early-model M2000 shotguns utilized a different magazine cap thread specification than later-production guns; we do not manufacture an extension nut to fit the earlier guns, and unfortunately do not have any information regarding a date or serial number at which this change took place. Compatibility with NUT-ST-12-00 can be determined by test-fitting the M2000 magazine cap to a known later-production M2000, or a Franchi Affinity/Intensity.
M3000/M3K
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-M3000-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 24″ | +5 | .500″ past muzzle |
| 26″ | +6 | .500″ past muzzle |
| 28″ | +6 | 1.500″ short of muzzle |
| 28″ | +7 | 1″ past muzzle |
| 30″ | +7 | 1″ short of muzzle |
| 30″ | +8 | 1.500″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
P3000/P3500
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-M3000-12-00
We do not have a measurements chart for this shotgun. Please use the information under TUBE LENGTHS to determine the desired tube length and capacity.
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
NOTES
The 930/940 shell stop can be very sensitive to magazine spring tension. We do not recommend using an HD spring in the 930.
M3500
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-M3000-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 24″ | +4 | .500″ past muzzle |
| 26″ | +5 | .250″ past muzzle |
| 28″ | +6 | .250″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
M3020
We do not currently manufacture an extension nut compatible with the Stoeger 3020.
Tristar
Raptor
FACTORY CAPACITY: 5 rounds
MXT EXTENSION NUT:
We do not have a measurements chart for this shotgun. Please use the information under TUBE LENGTHS to determine the desired tube length and capacity.
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
Weatherby
SA-08
FACTORY CAPACITY: 5 rounds
MXT EXTENSION NUT: NUT-BR-12-00 (NUT-BR-20-00 – 20ga)
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 24″ | +4 | .500″ past muzzle |
| 26″ | +4 | 1.500″ short of muzzle |
| 26″ | +5 | .500″ past muzzle |
| 28″ | +5 | 1.500″ short of muzzle |
| 28″ | +6 | .750″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
18i
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-BN-12-00
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 28″ | +5 | 1.500″ short of muzzle |
| 28″ | +6 | .750″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
Winchester
120/1200/1300
FACTORY CAPACITY: 5 rounds
MXT EXTENSION NUT: NUT-WIN-120
We do not have a measurements chart for this shotgun. Please use the information under TUBE LENGTHS to determine the desired tube length and capacity.
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
SX2/SX3/SX4
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-SX-12-00 (NUT-BG-20-00 – 20ga)
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 22″ | +4 | .250″ past muzzle |
| 24″ | +5 | Flush fit to muzzle |
| 26″ | +5 | 2″ short of muzzle |
| 26″ | +6 | .500″ past muzzle |
| 28″ | +6 | 1.500″ short of muzzle |
| 28″ | +7 | 1″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |
SXP (all models)
FACTORY CAPACITY: 4 rounds
MXT EXTENSION NUT: NUT-WIN-SXP
| BARREL LENGTH | RECOMMENDED EXTENSION | NOTES |
|---|---|---|
| 24″ | +4 | .500″ past muzzle |
| 26″ | +5 | .250″ past muzzle |
| 28″ | +6 | .250″ past muzzle |
ACCESSORIES
| Bolt handle | N/A |
| Barrel clamp | Standard (BCL-12 or BCT-12) |
| Follower | Standard (FOL-SG-12-00) |