5.56x45mm NATO Lower Receivers

Aero Precision M4E1 Builder Set w/ 15" ATLAS R-ONE M-LOK Handguard - Gunmetal Grain

Aero Precision M4E1 Builder Set w/ 10.3" ATLAS R-ONE M-LOK Handguard - Gunmetal Grain

Aero Precision M4E1 Builder Set w/ 15" ATLAS S-ONE M-LOK Handguard - Gunmetal Grain

Aero Precision M4E1 Builder Set w/ 15" Enhanced M-LOK Handguard - Gunmetal Grain

Aero Precision M4E1 Builder Set w/ 10.7" Enhanced M-LOK Handguard - Gunmetal Grain

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS S-ONE M-LOK Handguard - Cavern Flecktarn Camo

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS R-ONE M-LOK Handguard - MTC Dark Camo

Aero Precision M4E1 Builder Set w/ Enhanced M-LOK Handguard - OD Snakeskin - 15"

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS S-ONE M-LOK Handguard - Multi Terrain Camo

Aero Precision M4E1 Builder Set w/ 15" ATLAS R-ONE M-LOK Handguard - Yorktown Cerakote

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS R-ONE M-LOK Handguard - Yorktown Cerakote

Aero Precision M4E1 Builder Set w/ 15" ATLAS S-ONE M-LOK Handguard - Yorktown Cerakote

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS S-ONE M-LOK Handguard - Yorktown Cerakote

Aero Precision M4E1 Builder Set w/ 9.3" ATLAS S-ONE M-LOK Handguard - PA Gazette Cerakote

Aero Precision M4E1 Builder Set w/ 15" ATLAS R-ONE M-LOK Handguard - OD Topographic

Aero Precision M4E1 Builder Set w/ 9" Enhanced M-LOK Handguard - OD Topographic

Anderson Mil-Spec Lower Build Kit - Stainless (Silver)

Foxtrot Mike FM-5.56 Stripped Billet Lower Receiver

Anderson Stripped Lower Receiver - No Logo - Sniper Grey

Armaspec Superlight Lower Parts Kit Stainless LPK .223/5.56 - Gold

Armaspec S3 Enhanced Trigger Guard - Gold

UTG PRO AR-15 Ambidextrous Billet Lower Receiver - FLR002

LANTAC Raven Billet Side Charging AR-15 Receiver Set - 1-RV-SET-SC-RAVEN

Mike-15 Stripped Lowers - Mike-15 Stripped Lower Receiver W/Pic Rail 5.56mm