The original KAC MRE (Modular Rail Extension) was engineered as a full free floating handguard rail for military units fitting the M4 with a front sight base and extra rail to mount lights and accessories.

The Manual for Railway Engineering (MRE) is an annual publication released every April. The Manual consists of more than 5,000 pages of railway engineering reference material, the recommended practices for the industry.

The Knights Armament rail for sale offers unmatched fit and performance. Order a KeyMod or M-LOK KAC handguard for a low price at Omaha Outdoors.

The original Knight's Armament "MRE" (Modular Rail Extension) was engineered as a full free floating rail for military units fitting the M4 with a front sight base and extra rail to mount lights and accessories.

The Manual for Railway Engineering (MRE) is an annual publication released every April. The Manual consists of more than 6,100 pages of railway engineering reference material, the recommended practices for the industry.

The KAC Free Float RAS II (Rail Adapter System) is a unique variation of the US military M4 RAS handguard that enables shooters to install a free floating, quad rail forend onto their rifle without needing to disassemble the gas system or delta ring assembly.

The rail free floats the barrel, allowing for consistent barrel harmonics upon firing, and thus increased accuracy potential. The MRE kit is designed to work with M4 carbines, and accommodates a fixed A2 front sight tower with carbine length gas system.

The MRE kit is designed to work with M4 carbines, and accommodates a fixed A2 front sight tower with carbine length gas system. It extends past the front sight base, providing additional rail space for the mounting of tactical accessories. Includes three KAC 11 Rib Rail Panels.

Knight's Armament RAS MRE-Model B Rail kit is now available as a limited edition release from KAC's "vault" program. The design of the MRE handguard came together to integrate with the SOPMOD Block 1 kit, issued to US military in the early Global War on Terror.