GLFA GL-15 .450 Bushmaster AR-15, 18" Threaded Barrel, Free-Float M-LOK, Matte Gray, 7+1
This Great Lakes Firearms & Ammunition GL-15 is a big-bore AR-15 chambered in .450 Bushmaster with an 18" threaded barrel and a multi-port muzzle brake. It features a free-float aluminum M-LOK handguard with a full-length top Picatinny rail that aligns with the flat-top receiver. Finished in matte gray and built in Sparta, Michigan, it includes a 7-round Lancer L5 AWM magazine and runs a direct-impingement system with a 1:24 twist.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minor, superficial scratches and blemishes are present on the exterior surfaces.
What's Included
- Great Lakes Firearms & Ammunition GL-15 rifle in .450 Bushmaster with 18" barrel, matte gray
- 1x 7-round Lancer L5 AWM polymer magazine with steel feed lips
The 18" barrel is threaded and fitted with a multi-port muzzle brake secured by a hex-shaped timing/jam (lock) nut. The 1:24 twist rate is tailored to .450 Bushmaster loads, and the bore condition is excellent with sharp rifling.
The rifle uses a flat-top receiver with a continuous Picatinny rail that lines up with the full-length top rail on the free-float aluminum M-LOK handguard. There are no sights installed, allowing the user to configure the top rail as desired.
This AR-15 platform runs a semi-automatic, direct-impingement action. Controls include a manual safety and a standard charging handle with a single-sided latch. The upper features a forward assist, case deflector, and an ejection-port dust cover.
Furniture consists of a 6-position collapsible M4-style stock and an A2-style polymer pistol grip. Length of pull is adjustable to approximately 10–13.25 inches. The receiver wears a matte gray finish, and the lower is marked "MULTI CAL" with the GLFA logo.
Capacity is 7+1 with the included 7-round Lancer L5 AWM magazine featuring steel feed lips. The rifle is manufactured in Sparta, Michigan, USA.




