5.56x45mm NATO Lower Receivers

Sons of Liberty Gun Works Stripes Builder's Lower Receiver, No Trigger, No Safety, B5 Grip, Int Buffer System, No Stock L-Stripes-BLDR-A-BLK

Anderson Manufacturing AM-15 Complete AR-15 A2 Lower Receiver

Anderson Manufacturing AM-15 Complete AR-15 Magpul MOE Lower Receiver - Black

Anderson AM-15 Forged AR15 Matched Receiver Set

BUSHMASTER BFSIII 5.56 NATO Lower Receiver

BUSHMASTER M4 5.56 NATO Lower Receiver

BCA BC-15 556 COMPLETE LOWER

Dark Storm Industries DS-15 AR-15 5.56x45mm NATO Upper and Lower Receiver Parts Builder Box for Standard or Fixed Magazine Typhoon Rifle Anodized

FOSTECH RAPTOR 10.5" 5.56 GRY

FOSTECH STRYKER 7.5" 5.56 BLK

Ar-15 Kp-15 Stripped Lower Receivers Polymer - Kp-15 Stripped Lower Receiver Polymer Fde

223/5.56/300 Blk Sa M5 Bdm Triggerguard - 223/5.56 Sa M5 Bdm Triggerguard W/10rd Detachable Mdt Mag

Anderson Open Complete Lower Receiver - No Stock

KE Arms ~ KP-15 ~ 5.56 NATO

Anderson Manufacturing ~ Colt M16A1 Parts Kit Anderson Lower ~ 5.56 NATO

Stag Arms Tactical Lower 5.56/223

DPMS AR15 223/5.56 LOWER RECEIVER PARTS KIT

Menke Industry MR-15A2 5.56

2nd AMENDMENT ARMS 2A-15

LWRC International LWRCI PBC Lower Receiver ICEL5PBC in Brown

Ar-15 Complete M4 Lower Receiver - Complete Ar-15 Lower Receiver W/O Buttstock

Spike's Tactical Multi-Cal Spartan Complete Lower Receiver w/ Enhanced Lower Parts Kit & Magpul, Black

Spike's Tactical Multi-Cal Calico Jack Complete Lower Receiver w/ Enhanced Lower Parts Kit & Magpul, Black

Spike's Tactical Multi-Cal Punisher Complete Lower Receiver w/ Enhanced Lower Parts Kit & Magpul, Black