Bushmaster XM15-E2S 5.56mm NATO AR-15, 24-inch HBAR, A3 Flat-Top, Free-Float Rails, Fixed Stock
This Bushmaster XM15-E2S is a 5.56mm NATO semi-automatic AR-15 from the Windham, ME production era (1994–2006) with B.F.I. rollmark and an L-prefix serial. It features a 24-inch heavy HBAR barrel marked B MP 5.56 NATO 1/9 H BAR, a non-threaded crowned muzzle typical of AWB-era configurations, and an A3 flat-top upper. The rifle-length free-float aluminum handguard provides full-length 12 and 6 o'clock Picatinny rails, and the rifle includes a fixed stock and an aftermarket rubberized ergonomic pistol grip.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
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 good shape. There are minor and superficial scratches and blemishes present.
What’s Included
- Bushmaster XM15-E2S semi-automatic rifle (5.56mm NATO)
- 1x 10-round STANAG-pattern magazine (short metal-bodied with orange follower)
The XM15-E2S platform here pairs a 24-inch HBAR profile with a 1:9 twist, offering a magnetic particle inspected barrel clearly roll-marked B MP 5.56 NATO 1/9 H BAR. The non-threaded, plain-crown muzzle is consistent with AWB-era configuration and preserves a clean barrel end.
The A3 flat-top upper provides a full-length Picatinny rail on the receiver and includes a forward assist, brass deflector, and dust cover. No sights are installed, allowing the configuration to remain streamlined.
A rifle-length free-float aluminum handguard anchors the front end, featuring full-length 12 and 6 o'clock Picatinny rails with oval side vents. The free-float design separates the handguard from barrel contact to support consistent barrel harmonics.
The fixed polymer stock incorporates a trapdoor buttplate and a rear sling swivel. An aftermarket rubberized ergonomic finger-groove pistol grip enhances purchase at the control point. Length of pull measures 13.25 inches.
This semi-automatic, direct impingement rifle is built on aluminum-alloy receivers and feeds from STANAG-pattern detachable box magazines. It ships with a 10-round magazine and is chambered in 5.56mm NATO.