Bushmaster ACR has ability to change calibers, barrel lengths and stock configurations in minutes – without the use of tools. 16 1" cold hammer-forged barrel with innovative coating for extreme long life. AAC Blackout non mount flash hider with exceptional signature reduction. Adjustable, two-position gas-piston-driven system, for firing suppressed or unsuppressed. Tool-less quick-change barrel system available in 10.5", 14.5", 16.5" and in multiple calibers. Multi-caliber bolt carrier assembly quickly and easily changes from 6.8mm Rem SPC to 223/5.56mm NATO. Free-floating MIL-STD 1913 monolithic top rail for optic mounting. Fully ambidextrous controls include magazine release, bolt catch and release, fire selector and non-reciprocating charging handle. High-impact composite lower receiver with textured magazine well and modular grip storage. Folding and six-position telescoping high-impact polymer stock with rubber butt pad and sling mounts. Magpul MBUS front/rear flip sights. Ships in oversized hard case for accessory storage, includes 30-round PMAG. Three-sided aluminum hand guard with integral MIL-STD 1913 rail for accessory mounting. 2-point push button sling
| Action: | Semi automatic |
| Caliber: | 223 Remington |
| Barrel length: | 16.5" |
| Barrel finish: | Blued |
| Barrel type: | Round |
| Grooves: | 6 |
| Rate of twist: | 1 in 10" |
| Stock type: | Folding |
| Stock material: | Synthetic |
| Stock finish: | Tan |
| Butt: | Rubber |
| Overall length: | 35" |
| Sights: | Magpul MBUS Flip Up |
| Trigger: | Adjustable |
| Magazine capacity: | 30 |
| Magazine type: | Detachable Box |
| Weight: | 8.2 lbs. |
