Bushmaster ACR Enhanced 5.56 NATO, 16.5 inch, Short-Stroke Gas Piston, Geissele Super ACR Trigger, Windham-Marked Early Production
This Bushmaster ACR Enhanced stands out for its Windham, Maine receiver marking (an early production context) and a factory-marked BACR MULTI-CAL receiver. It features a 16.5-inch MP-inspected, free-floated, threaded barrel with a 1:9 twist and a pronged flash suppressor using a ratcheting/collar-style interface. An installed Geissele Super ACR trigger, adjustable short-stroke gas piston system with forward regulator, and the ACR's modular quick-change barrel system secured by a captive Torx-head retention screw (Torx driver required) round out a configuration aimed at performance and versatility.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Specific Condition Details: This firearm is in solid shape. It has various cosmetic imperfections, scratches, blemishes, and areas of finish loss. The bore remains clean and shiny.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
What’s Included
- 1x 30-round ProMag polymer magazine (as shown)
- Folding front and rear backup sights (installed)
- Geissele Super ACR trigger (installed)
- Rail-mounted hand stop on the 6 o'clock rail (installed)
The Enhanced configuration adds an aluminum quad-rail handguard and a full-length 1913 Picatinny top rail, providing ample mounting space. A rail-mounted hand stop is installed on the 6 o'clock rail. Folding front and rear backup sights are installed.
The barrel is a 16.5-inch steel, MP-inspected, free-floated unit with a 1:9 twist, threaded muzzle, and a pronged flash suppressor secured by a ratcheting/collar-style interface. The ACR's modular quick-change barrel system is secured by a captive Torx-head retention screw and supports fast configuration changes (Torx driver required).
Its adjustable short-stroke gas piston system with a forward-position regulator is paired with a left-side, reversible charging handle. The rifle uses a STANAG-pattern magazine interface and features an open ejection port with a fixed brass deflector (no traditional dust cover) on a receiver set consisting of an aluminum upper and a polymer lower.
The stock is side-folding and telescoping, with an adjustable cheek riser and adjustable length of pull. A Geissele Super ACR trigger is installed, providing an upgraded fire-control component within the ACR platform.
Receiver markings include B.F.I. WINDHAM, ME, U.S.A., MODEL–BACR, and CALIBER–MULTI. The barrel is marked B MP 5.56 NATO 1/9. This Windham-marked example reflects early production context for the model.