Bushmaster XM15-E2S 5.56 NATO AR-15, 16 inch M4-Profile Barrel, A4 Flat-Top, STX Quad-Rail, 10 Magazines
This Bushmaster XM15-E2S is a 5.56mm NATO semi-automatic AR-15 featuring a 16-inch M4-profile 4150 CMV barrel, a flat-top A4 upper, and a pinned A2 front sight base with bayonet lug. It is upgraded with an STX two-piece aluminum quad-rail handguard and comes with ten magazines and a sling. The bore is excellent with a clean, mirror finish.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are scratches on the lower receiver, and some dents are present.
What’s Included
- Eight 30-round magazines (mix of MFT polymer and aluminum USGI-pattern)
- Two 20-round magazines (mix of MFT polymer and aluminum USGI-pattern)
- Black single-point bungee sling
- STX two-piece aluminum quad-rail handguard (installed)
The XM15-E2S platform uses forged 7075-T6 aluminum receivers and a direct-impingement, semi-automatic action. The receiver is marked B.F.I. ILION, N.Y. U.S.A. and includes a manual safety selector.
This example is a full-size configuration built on the AR-15 pattern and accepts STANAG magazines.
The 16-inch barrel is made from 4150 CMV steel with an M4 profile and a carbine-length gas system. It retains a pinned A2 front sight base with bayonet lug and an A2 birdcage flash hider. The muzzle is threaded 1/2x28 for standard 5.56 accessories.
The upper is an A4 flat-top with an integral Picatinny rail, forward assist, and ejection-port cover. It retains the A2 front sight; no rear sight is installed. The handguard has been upgraded to an STX-marked, two-piece aluminum quad-rail for accessory mounting.
Furniture includes a Bushmaster-marked 6-position M4-style collapsible stock and an A2-style polymer pistol grip. Capacity is 30+1 with compatible STANAG-pattern detachable box magazines. This rifle ships with a total of ten magazines and a black single-point bungee sling.




