The M107A1-S itself offers a wide range of upgrades over the original, one of the most notable is an improved compatibility with suppressors. The barrel has been reduced to 20-inches, this was done to better accommodate the lengthy .50-caliber suppressors - many of which are well over a foot long - allowing for effective suppressed fire with minimal effect on the rifle's overall length. The bolt carrier and buffer assemblies have also been optimized for use with a suppressor thanks to a Nickel Teflon Coating to reduce carbon fouling and maintenance after suppressed firing. Another notable upgrade of the M107A1-S is a steel receiver for enhanced durability. It comes equipped with a titanium bipod and monopod for optimal stability when shooting from a bench rest or prone position. The cylindrical muzzle brake greatly reduces the harsh recoil of the .50-caliber cartridge, and serves as a solid mounting interface for Barrett's QDL suppressor. Includes hard case. 48" overall length. - CALIBER .50 BMG - MAGAZINE (1) 10 capacity - BARREL 20" Fluted chrome lined - MUZZLE Cylindrical brake - RECEIVER 27 MOA M1913 Picatinny Rail - SIGHTS Rear Iron - STOCK Modular rear grip mount