Bushmaster XM15-E2S 5.56mm NATO AR-15 Carbine, 16 in M4-Profile Barrel, A2 Flash Suppressor, Flat-Top Rail, Collapsible Stock
This Bushmaster Mod. XM15-E2S is a 5.56mm NATO AR-15 carbine from the 2011–2014 era, identifiable by the B.F.I. Ilion, N.Y. rollmark and LBM-prefix serial range. It features a 16-inch M4-profile barrel with a 1:9 twist, a carbine-length gas system, and the "B MP" barrel marking.
A flat-top upper with MIL-STD-1913 rail, fixed A2 front sight base, and an A.R.M.S. detachable rear flip-up sight round out a practical, well-configured carbine. The receiver and furniture are classic AR components, including a collapsible stock, two-piece ribbed carbine handguard, and A2-pattern pistol grip.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape. There are scratches and blemishes present. The bore is clean and shiny.
What’s Included
- A.R.M.S. detachable rear flip-up sight (installed)
- 1x 30-round USGI-style aluminum STANAG-pattern magazine
- Nylon sling
The XM15-E2S operates via a semi-automatic, direct-impingement system with a carbine-length gas setup. The 16-inch M4-profile barrel uses a 1:9 twist and wears an A2 flash suppressor on its threaded muzzle. The "B MP" marking denotes Bushmaster’s proof and magnetic particle testing on the barrel.
The upper receiver is a flat-top design with a MIL-STD-1913 rail, paired with a fixed A2 front sight base and a detachable A.R.M.S. rear flip-up sight. A forward assist, ejection-port cover, and a bayonet lug are present, reflecting a traditional carbine feature set. The handguard is a carbine-length, two-piece ribbed polymer unit.
Furniture includes a collapsible polymer stock with adjustable length of pull and an A2-pattern pistol grip. The alloy receiver carries a matte anodized finish for a uniform, low-glare appearance. A STANAG-pattern magazine interface ensures compatibility with standard-pattern magazines.
Production traits point to the 2011–2014 timeframe, confirmed by the B.F.I. Ilion, N.Y. rollmark and an LBM-prefix serial range. This carbine is configured in 5.56mm NATO with a 30+1 capacity and includes a nylon sling and one 30-round USGI-style aluminum magazine.