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Home Shotgun Parts Receiver & Action Parts Action Parts Action Hardware GENESIS ARMS GEN-12 UPPER RECEIVER 12 GAUGE Support
Upgrade your shotgun with the GEN-12 Upper Receiver! 🔥 Compatible with DPMS GEN1 lowers, it cycles smoothly and handles various shells.

GENESIS ARMS GEN-12 UPPER RECEIVER 12 GAUGE - GENESIS ARMS GEN-12 10.5" UPPER RECEIVER 12 GAUGE

100042646

Variations:

Upgrade your shotgun with the GEN-12 Upper Receiver! 🔥 Compatible with DPMS GEN1 lowers, it cycles smoothly and handles various shells.
GENESIS ARMS GEN-12 10.5" UPPER RECEIVER 12 GAUGE
1999.9 GBP 0 £1,999.90 *
Not available - Is a 'Call to order' product.
Product no.: 100042646
Not available - Is a 'Call to order' product.
1999.9 GBP 0 £1,999.90 *
Ask question
Upgrade your shotgun with the GEN-12 Upper Receiver! ✨ Compatible with DPMS GEN1 lowers, it cycles smoothly with various shell sizes.
GENESIS ARMS GEN-12 14.5" UPPER RECEIVER 12 GAUGE
1999.9 GBP 0 £1,999.90 *
Not available - Is a 'Call to order' product.
Product no.: 100042645
Not available - Is a 'Call to order' product.
1999.9 GBP 0 £1,999.90 *
Ask question
Upgrade your shotgun with the GEN-12 Upper Receiver! 🔥 Compatible with DPMS GEN1 lowers, it cycles smoothly and handles various shells effortlessly.
GENESIS ARMS GEN-12 18" UPPER RECEIVER 12 GAUGE
1849.9 GBP 0 £1,849.90 *
Not available - Is a 'Call to order' product.
Product no.: 100042644
Not available - Is a 'Call to order' product.
1849.9 GBP 0 £1,849.90 *
Ask question
1849.9 1999.9 3 GBP
1999.9 GBP £1,999.90

Prices inclusive of duty & VAT.

Product no.: 100042646

Mfr. No.: G12U10

The GEN12 was not the 1st ""AR shotgun"", but it is the first to use a standard 308 lower. The GEN12 upper was specifically designed to matte to any DPMS GEN1 308 Lower or other 308 lowers sharing the same pattern. The GEN12 upper will work with either the shorter DPMS buffer tube or the longer Armalite AR10®/ 308 tubes. The center of the upper is the short recoil system which cycles the action. This means there is no gas tube or piston. The cyclic rate can be tuned by adjusting buffer weights and springs by the end user. The upper will cycle birdshot or magnums and most everything in between. It reliably feeds both 2 ¾” shells and 3” shells on a standard short DPMS 308 buffer and spring. However they recommend a H3 buffer or a Hydraulic buffer when shooting magnums or any 3”. These uppers are compatible with SGM Tactical Saiga 12 choke tubes with external threads. This is sold as an upper so this does not require a FFL to purchase; however, you are responsible to know the laws in your state and purchase accordingly. Some Assembly required: Do to the shock and recoil from the 12 gauge, and the inherent differences within magazine geometry, you will be provided several parts to replace on your DMPS GEN1 patterned lower to ensure functionality and compatibility. BEEF UP KIT: Magazine catch & increased power spring Bolt catch & increased power spring Anti-rotation trigger pin set ***These parts need to be installed.
Not available - Is a 'Call to order' product.
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Not available.

Is a 'Call to order' product.

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Requires order by phone

Variations:

Upgrade your shotgun with the GEN-12 Upper Receiver! 🔥 Compatible with DPMS GEN1 lowers, it cycles smoothly and handles various shells.
GENESIS ARMS GEN-12 10.5" UPPER RECEIVER 12 GAUGE
1999.9 GBP 0 £1,999.90 *
Not available - Is a 'Call to order' product.
Product no.: 100042646
Not available - Is a 'Call to order' product.
1999.9 GBP 0 £1,999.90 *
Ask question
Upgrade your shotgun with the GEN-12 Upper Receiver! ✨ Compatible with DPMS GEN1 lowers, it cycles smoothly with various shell sizes.
GENESIS ARMS GEN-12 14.5" UPPER RECEIVER 12 GAUGE
1999.9 GBP 0 £1,999.90 *
Not available - Is a 'Call to order' product.
Product no.: 100042645
Not available - Is a 'Call to order' product.
1999.9 GBP 0 £1,999.90 *
Ask question
Upgrade your shotgun with the GEN-12 Upper Receiver! 🔥 Compatible with DPMS GEN1 lowers, it cycles smoothly and handles various shells effortlessly.
GENESIS ARMS GEN-12 18" UPPER RECEIVER 12 GAUGE
1849.9 GBP 0 £1,849.90 *
Not available - Is a 'Call to order' product.
Product no.: 100042644
Not available - Is a 'Call to order' product.
1849.9 GBP 0 £1,849.90 *
Ask question

Description:

The GEN12 was not the 1st ""AR shotgun"", but it is the first to use a standard 308 lower. The GEN12 upper was specifically designed to matte to any DPMS GEN1 308 Lower or other 308 lowers sharing the same pattern. The GEN12 upper will work with either the shorter DPMS buffer tube or the longer Armalite AR10®/ 308 tubes. The center of the upper is the short recoil system which cycles the action. This means there is no gas tube or piston. The cyclic rate can be tuned by adjusting buffer weights and springs by the end user.   The upper will cycle birdshot or magnums and most everything in between. It reliably feeds both 2 ¾” shells and 3” shells on a standard short DPMS 308 buffer and spring. However they recommend a H3 buffer or a Hydraulic buffer when shooting magnums or any 3”. These uppers are compatible with SGM Tactical Saiga 12 choke tubes with external threads.    This is sold as an upper so this does not require a FFL to purchase; however, you are responsible to know the laws in your state and purchase accordingly. Some Assembly required: Do to the shock and recoil from the 12 gauge, and the inherent differences within magazine geometry, you will be provided several parts to replace on your DMPS GEN1 patterned lower to ensure functionality and compatibility.   BEEF UP KIT: Magazine catch & increased power spring Bolt catch & increased power spring Anti-rotation trigger pin set ***These parts need to be installed.

Restrictions

  • Is a 'Call to order' product.

Top takeaways

  1. The GEN12 upper receiver by Genesis Arms LLC is designed to fit any standard DPMS GEN1 308 Lower and is compatible with both DPMS and Armalite AR10®/308 buffer tubes.
  2. It features a short recoil system for cycling the action without the need for a gas tube or piston and can be tuned for different ammunition by adjusting buffer weights and springs.
  3. The upper is capable of firing both 2 ¾” and 3” shells and comes with a BEEF UP KIT to ensure compatibility and functionality with the DMPS GEN1 patterned lower.

Attributes

  • Delivery weight: 2.697kg
  • Shipping height: 108mm
  • Shipping width: 108mm
  • Shipping length: 625mm

Item details

Made in USA
US export classification: 0A501.d

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