Luth-ar LRPK-BLDR-308 Lower Parts Kit Builder AR Platform 308 Cal

Description Luth-AR produces the best quality, American made parts for the AR platform. All of the parts included in the lower parts kits are investment cast or otherwise machined to Mil-Spec drawings, materials and heat treat. Springs are a combination of 17-4 SST and various Mil-Spec steel wire are used in all of our springs with certification.