| LMT Monolithic Barrel Assembly MRP 20" Stainless Steel .204 Ruger - L7CA1B Lewis Machine and Tool MRP™ barrel assemblies are unique to the Monolithic Rail Platform system. With the proper installation wrench, an operator can customize his rifle for the mission at hand without armorer or gunsmith assistance. 20" Stainless Steel CQB MRP™ .204 Ruger barrel assembly, 1:12" twist. Designed for the CQB MRP™ and MRP™ upper receiver. |