AR Parts in 5.56x45mm NATO

Sons of Liberty Gun Works M4-76 5.56 Barreled Upper Receiver - 13.7"

LMT AR-15 Extractor 5.56

Lewis Machine and Tool Chrome Lined 5.56 AR-15 Barrel With A2 Front Sight Gas Block - Carbine - M4 - 10.5"

Lewis Machine and Tool Chrome Lined 5.56 AR-15 Barrel With A2 Front Sight Gas Block - Carbine - M4 - 14.5"

Lewis Machine and Tool Monolithic MRP-L Shovelnose Assembled AR-15 Upper Receiver - 11.5"

Lewis Machine and Tool MRP-L Stripped AR-15 Upper Receiver - 9.25" - M-LOK Grenadier Handguard

Lewis Machine and Tool MRP-L Stripped AR-15 Upper Receiver - 9.25" - M-LOK Handguard

Lewis Machine and Tool MRP Chrome Lined 5.56 AR-15 Barrel - Rifle Length - Medium - 20"

LMT Full Auto Piston Bolt Carrier Assembly - Gen 2 - 5.56

LMT Enhanced M16 Bolt Carrier - Parkerized

Lewis Machine and Tool Monolithic MRP-L PDW Assembled AR-15 Upper Receiver - 7.25"

Lewis Machine and Tool MRP Chrome Lined 5.56 AR-15 Barrel - Mid-Length - Medium - 14.5"

Lewis Machine and Tool MRP Chrome Lined 5.56 AR-15 Piston Barrel - Carbine - Medium - 14.5"

Lewis Machine and Tool Piston Gen 2 5.56 AR-15 Bolt Carrier Group - Phosphate

LMT Defense Semi-Auto G2 5.56 AR-15 Bolt Carrier Group - Chrome

LMT Defense Semi-Auto 5.56 AR-15 Bolt Carrier Group - Phosphate

KAK Industry 5.56 AR-15 Barrel - Mid-Length - Tapered - 13.9"

KAK Industry 5.56 AR-15 Barrel - Carbine - Standard - 11.5"

LWRC Individual Carbine A5 Complete Upper 5.56 - Black - 16"

HRF Concepts 5.56 Marked Dust Cover - Open Box

Centurion Arms CHF Chrome Lined 5.56 AR-15 Barrel - Mid-Length - Lightweight - 16"

Hodge Defense Systems 5.56 AR-15 Bolt Carrier Group - Nitride

Ghost Firearms M4 Elite Complete Upper Receiver - 5.56 NATO - FDE - 16"

Evolve Weapons Systems M4 Stripped AR-15 Upper Receiver - Green