Stag Arms STAG-15 5.56 NATO AR-15 with Diamondhead Free-Float Rail, Pinned Brake & Stock, 16.5 in Barrel, 10+1 Capacity
This Stag Arms STAG-15 is a 5.56×45mm NATO AR-15 configured with a Diamondhead USA free-float handguard, a flat-top upper with T-marked Picatinny rail, and compliance-focused pinning on both the muzzle device and stock. It features a 16.5 inch barrel, a 10+1 capacity, and matte black anodized aluminum receivers. The rifle is presented as left handed and would make a great rifle for a left handed shooter.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm is in great shape. There are some minor scratches and blemishes present. The bore is clean and shiny.
What’s Included
- Stag Arms STAG-15 5.56×45mm NATO semi-automatic rifle
- 1x 10-round metal-bodied 5.56×45 magazine with polymer base; floorplate marked "5.56 × 45"
The STAG-15 platform here is chambered in 5.56×45mm NATO and built on matte black anodized aluminum receivers. The lower is marked "STAG ARMS NEW BRITAIN, CT USA" and "MODEL: STAG-15 CAL: MULTI," highlighting its U.S. origin and factory pedigree. It uses a semi-automatic, direct-impingement action with a 16.5 inch barrel and a 10+1 capacity.
A Diamondhead USA free-float aluminum handguard anchors the front end, providing a continuous top Picatinny rail for accessories and a short rail section at the 6 o'clock position. The flat-top upper includes a T-marked Picatinny rail that makes it straightforward to position optics or other rail-mounted equipment as needed.
Compliance-oriented features include a muzzle brake/compensator that is pinned and welded, and an M4-style collapsible stock that is pinned in place. The rifle uses a polymer stock, an A2-style pistol grip, and a manual safety. It is configured for 10-round magazines and ships with a single 10-round magazine.
The seller indicates this rifle is left handed and would make a great rifle for a left handed shooter. Photos show right-side ejection not confirming a left-handed upper. Additional features include a 13.5 inch length of pull and a clean, matte black finish across the receivers and furniture. Sights are not included from the factory on this configuration.