Stag Arms STAG-15 .450 Bushmaster 16 in AR-15, Free-Float M-LOK Handguard, Threaded Barrel with Muzzle Brake, Ambi Safety, Two-Tone Black/Gray, 7+1
This Stag Arms STAG-15 is a purpose-built AR-15 chambered in .450 Bushmaster with a 16-inch, 1:24-twist barrel and a free-float M-LOK handguard. It features a threaded muzzle with a multi-port brake, an ambidextrous safety, and an adjustable carbine stock. Clear factory markings on the receiver and barrel and a clean, excellent-condition bore round out a straight-shooting, big-bore configuration made in the USA.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This rifle shows only light handling evidence. Surfaces present cleanly throughout, and the bore displays a bright, reflective appearance.
What’s Included
- 1x 7-round C Products Defense .450 Bushmaster AR-15 magazine (steel)
The 16-inch barrel is rollmarked ".450 BUSHMASTER 1:24 USA" and is threaded at the muzzle, capped with a multi-port brake/compensator featuring angled and spiral slots to manage recoil. The 1:24 twist is appropriate for typical .450 Bushmaster bullet weights.
A free-float metal handguard provides a continuous top Picatinny rail with M-LOK slots at the 3, 6, and 9 o’clock positions, and is secured with two cross-bolts at the rear. This setup offers solid mounting interfaces while keeping barrel contact minimized.
Controls include an ambidextrous safety and a standard magazine release. The polymer carbine stock is adjustable and telescoping, with a stated length of pull range from 10 to 13.25 inches. An A2-style pistol grip completes the familiar AR-15 control layout.
Chambered in .450 Bushmaster, this STAG-15 uses detachable AR-15–pattern magazines and has a stated capacity of 7+1. The metal receiver wears a matte black finish, and the rifle operates via a direct impingement, semi-automatic action.
Receiver markings include "STAG ARMS NEW BRITAIN, CT USA" with the stag-head logo on the left, and "MODEL STAG-15 CAL MULTI" with selector legends "SAFE / FIRE" on the right. The build and markings reflect U.S. manufacture and the company’s established AR heritage.