Description
Box-fed 12 gauges have come a long way, and the Derya DY12 is a strong example of the breed done right. It runs a gas-operated semi-auto action inside upper and lower receivers forged from 7075 T6 aluminum, the same alloy you'll find in quality AR receivers. The controls, adjustable mil-spec stock, and AR-style pistol grip will feel familiar the second you shoulder it, which means less time relearning your manual of arms and more time putting shells downrange.
What the DY12 Brings to the Table
The 18 inch barrel is threaded and wears a durable melonite-style finish, and the 3 inch chamber handles both 2-3/4 and 3 inch shells. Derya includes three mobile choke tubes, improved cylinder, modified, and full, so you can tighten or open your pattern depending on the job. Flip-up front and rear sights come installed, and the full-length Picatinny top rail takes red dots or optics without drama. M-LOK slots on the handguard give you room for a light or hand stop, and the mil-spec buffer tube means swapping stocks or grips is a five minute job with parts you probably already own.
Magazine Options That Make Sense
Instead of one mag and a handshake, the DY12 ships with three: a 2-rounder for hunting, a 5-rounder for general use, and a 10-round stick when you want fewer reloads at the range. Magazines interchange across the DY12 family, and factory drum mags up to 21 rounds are out there if you want to go big. One tip from experience with mag-fed autoloaders: feed it quality loads running around 1,250 fps or better and it will cycle happily. Bargain bin low-brass target loads are where most gas guns get cranky.
The Full Derya DY12 Package
The whole rig arrives in a soft case with a sling, earmuffs, a heavy piston for lighter loads, cleaning cloth, and documentation. For 3-gun, home protection, or just a fun day turning clay into dust, the DY12 covers a lot of ground for the money.
Key Specifications
- Model: DY12
- Manufacturer Part Number: DY12.18.US
- UPC: 860012072705
- Gauge: 12 Gauge
- Chamber: 3" (accepts 2-3/4" and 3" shells)
- Action: Gas-Operated Semi-Auto
- Barrel Length: 18", Threaded (M24x1)
- Overall Length: 37.1"
- Capacity: 5+1 (as shipped)
- Receivers: Forged 7075 T6 Aluminum, Black Anodized
- Stock: Adjustable Mil-Spec Polymer with AR-Style Pistol Grip
- Sights: Flip-Up Front and Rear
- Rail/Handguard: Full-Length Picatinny Top Rail, M-LOK Slots
- Choke Tubes: 3 (Improved Cylinder, Modified, Full)
- Color: Black
What’s Included
- Derya DY12 12GA semi-auto shotgun
- 2-round magazine
- 5-round magazine
- 10-round magazine
- 3 mobile choke tubes (Improved Cylinder, Modified, Full)
- Premium soft case
- Sling
- Earmuffs
- Heavy piston
- Cleaning cloth
- Gun lock
- Owner's manual and Derya accessory bag
Frequently Asked Questions
What ammo does the Derya DY12 run best with?
Like most mag-fed gas guns, the DY12 likes loads with some authority behind them. Shells running around 1,250 fps or faster cycle reliably, and full-power buckshot and slugs run great. Light, low-brass promo loads are the usual culprit when any gas-operated shotgun short cycles, so save those for pump guns.
What magazines come with the DY12 and can I get bigger ones?
It ships with three: a 2-round, a 5-round, and a 10-round, all of which feed both 2-3/4 inch and 3 inch shells. Magazines interchange across the DY12 series, and Derya offers factory drum magazines up to 21 rounds if you want serious capacity on tap.
Can I swap the stock and grip on the DY12 with AR parts?
Yes, that's one of the best things about this platform. The DY12 uses a mil-spec buffer tube and an AR-adaptable pistol grip, so most aftermarket AR stocks and grips will drop right on. The full-length Picatinny rail and M-LOK handguard handle optics, lights, and other accessories too.
Is the Derya DY12 barrel threaded for chokes or muzzle devices?
Both, in a sense. The 18 inch barrel accepts the three included mobile choke tubes for pattern control, and the muzzle itself has an M24x1 right-hand metric thread for compatible muzzle devices. Running the included chokes keeps things simple for most range and field work.




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