Barrett REC7 VS Bushmaster ACR

The REC7 operating system was designed to be soldier-proof, the highest accolade as to which a firearm design can aspire. A minimal number of parts and a clean-running piston system add up to a low-maintenance design with increased reliability. The piston operated system keeps heat and fouling out of the receiver, which means less time cleaning and more time putting bullets where they need to go. Cooler parts last longer, cooler guns run longer. REC7 was made to run hard. The 17-4 stainless piston transferring energy to the bolt carrier is the most robust in the industry. Its hardened one piece piston is superior to multi-component designs. The bolt carrier, machined from a monolithic block of 8620 steel features an integral piston strike face - no separate gas key to shoot loose and another industry first.

The Adaptive Combat Rifle (ACR) is a modular assault rifle designed by Magpul Industries of Austin, Texas, and known initially as the Masada. In late January 2008, Bushmaster Firearms International entered into a licensing agreement with Magpul whereby Bushmaster would take over production, future development, and sales of the Masada.[5] It was then known as the Bushmaster ACR. However, Remington Arms is contracted to manufacture the rifle for the US military and US law enforcement agencies, in which it is known as the Remington ACR. Hence, Remington Arms is responsible for the selective fire version of the ACR, while Bushmaster Firearms International is responsible for the semi-automatic only version. The Remington ACR was one of the weapons displayed to U.S. Army officials during an invitation-only Industry Day on November 13, 2008. The goal of the Industry Day was to review current carbine technology prior to writing formal requirements for a future replacement for the M4 Carbine. It was also part of the Individual Carbine competition to replace the M4.