R5 RGP
From Infogalactic: the planetary knowledge core
Lua error in package.lua at line 80: module 'strict' not found. Lua error in Module:Infobox at line 235: malformed pattern (missing ']'). R5 RGP (Remington Gas Piston) is an M4 carbine designed and manufactured by Remington Arms. It is one of many AR-15 variants which uses a gas piston operating system in an attempt to improve the reliability of the platform.