GYR Arms Mod. GR-15 5.56 NATO AR-15, 16 in Barrel, Free-Float M-LOK, Threaded, B5 Stock, 5 Magazines
This GYR Arms Mod. GR-15 is a 5.56 NATO AR-15 built with a 16-inch, 1:7-twist barrel and a direct-impingement system. It features a flat-top upper and a free-float M-LOK handguard with T-marked Picatinny rails, a low-profile gas block, and an A2-style flash hider on a threaded muzzle. The rifle is outfitted with B5 Systems furniture and comes with five 30-round magazines and a GYR Arms-branded hard case. Receiver markings note manufacture in Boulder City, Nevada.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The rifle presents in great shape with a few small, superficial scratches and blemishes from light handling.
What’s Included
- GYR Arms-branded hard rifle case
- Five 30-round magazines (combination of Magpul PMAG windowed polymer and aluminum GI-style STANAG)
The GR-15 follows the AR-15 pattern with a direct-impingement action and a detachable STANAG magazine interface. The flat-top receiver and matching handguard use T-marked Picatinny rails, and the free-float M-LOK handguard provides ample mounting real estate along its length.
The 16-inch barrel is chambered in 5.56 NATO and marked with a 1:7 twist. It has a threaded muzzle capped with an A2-style flash hider and crush washer. A low-profile gas block is secured with set screws to maintain a clean profile under the handguard.
B5 Systems furniture includes an adjustable carbine stock with an integrated QD sling socket and a B5 Systems polymer grip. Controls include a manual safety selector, forward assist, and ejection-port cover. Length of pull is adjustable from approximately 11 to 14 inches.
The rifle is finished in matte black, with matching receiver and furniture. It is made in the United States and marked on the receiver: "GYR ARMS • BOULDER CITY, NV • CAL. MULTI • MOD. GR-15." Capacity is 30+1, and no iron sights are installed.