Bushmaster ACR (Adaptive Combat Rifle) The Bushmaster ACR is the first of its kind, and the only rifle you need to master the infinite number of extreme scenarios you'll face in the worlds of law enforcement and personal defense. The new Bushmaster ACR redefines the term "modular" with the extraordinary ability to change calibers, barrel lengths and stock configurations in minutes without the use of tools. The Bushmaster ACR is the most versatile and adaptive rifle ever conceived, it was born of a collaborative effort between Bushmaster, Magpul(R) and Remington(R) to create the ultimate military combat weapons system. We're proud to unveil the evolution you see here built specifically for our law-enforcement and commercial markets. The Bushmaster ACR has been tested and proven to be reliable in the most brutal conditions on earth, truly ambidextrous and the uncompromising choice when you demand a rifle as mission-adaptable as you are. The Bushmaster ACR is the only Choice Bushmaster ACR Specifications 16 inch cold hammer-forged barrel with innovative coating for extreme long life AAC Blackout 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 18" and in multiple calibers Multi-caliber bolt carrier assembly quickly and easily changes from 223/5.56mm NATO to 6.8mm Rem SPC 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 includes 30-round mag Three-sided aluminum hand guard with integral MIL-STD 1913 rail for accessory mounting. UMUM-CN