The TacFire SSRK556LPK Lower Parts Kit Unassembled Rifle Kit brings together a complete AR-15 upper and lower parts set for builders who want a cohesive, reliable 5.56 NATO/223 Rem platform...

The TacFire SSRK300LPK AR Build Kit Sports South Exclusive 300 Blackout AR-Platform Black Nitride 1/2"x28 provides a complete upper and lower parts solution for building a 300 Blackout AR from the...

The TacFire SSPK300LPK7K AR-15 Pistol Build Kit KeyMod 300 Blackout Black Steel brings together everything you need to assemble a compact .300 AAC Blackout AR pistol upper and related components...

The TacFire SSPK300LPK10 AR Build Kit Pistol Sports South Exclusive 300 Blackout AR Pistol Platform brings together a complete upper and lower parts kit built around a 10.5" .300 AAC Blackout...

The TacFire SSRK45ACPLPK AR Build Kit Sports South Exclusive 45 ACP AR-Platform Black Nitride provides a complete upper and lower parts kit for building a dedicated .45 ACP AR rifle. Centered around...

The TacFire SSRK9MM16LPK AR Build Kit Sports South Exclusive 9mm Luger AR-15 brings together a complete upper and lower parts kit for building a dedicated 9mm AR-15. Featuring a 16" nitride barrel...

The ALG Defense AR-15 Lower Parts Kit With Grip With ACT Trigger brings together a complete set of mil-spec lower receiver components with ALG’s refined ACT (Advanced Duty Trigger) for a smoother,...

The ALG Defense AR-15 Lower Parts Kit W/ QMS Trigger is a complete mil-spec lower receiver kit built around ALG’s Quality Mil-Spec (QMS) trigger. Designed for AR-15 platform rifles, this kit provides...

The One Horse AR-15 Complete Lower Parts Kit brings together every essential small part you need to finish a mil-spec AR-15 lower receiver. From the phosphate-coated single-stage trigger to the...

The CMMG Zeroed Lower Parts Kit Mk3 Gunbuilder’s Kit gives AR-pattern builders a focused set of premium lower receiver components tailored to the Mk3 platform. This kit centers on CMMG’s Zeroed line...

The CMMG AR-15 Zeroed Lower Parts Kit Gunbuilder's Kit is built for shooters who want a clean, reliable foundation for their AR-15 or Mk4 lower. This kit focuses on the core controls and hardware,...

The DPMS SBA3 Lower Build Kit W/Trigger gives AR-15 pistol builders a complete, well-matched set of lower components in one package. Centered around an Enhanced Polished Trigger and Magpul MOE grip,...