AR Parts in 5.56x45mm NATO

Spikes Tactical Upper 5.56 16in M4 LE w/7in BAR2 Rail & FSP

Spikes Tactical Barrel 5.56 - 16in Midlength CHF w/M4 Extension w/Gas Block

Spikes Tactical Barrel 5.56 - 16in Midlength LE w/ FSP

Spikes Tactical Barrel 5.56 - 16in M4 LE w/ Gas Block

Spikes Tactical Barrel 5.56 - 16in M4 LE w/ FSP

Spikes Tactical Barrel 5.56 - 14.5in Midlength CHF w/M4 Extension w/Gas Block

Spikes Tactical Barrel 5.56 - 14.5in Midlength CHF w/M4 Extension w/FSP

Spikes Tactical Barrel 5.56 - 14.5in Mid-Length Lightweight w/Gas Block

Spikes Tactical Barrel 5.56 - 14.5in MidLength Lightweight w/ FSP

Spikes Tactical Barrel 5.56 - 14.5in Mid-Length Lightweight

Spikes Tactical Barrel 5.56 - 11.5in Lightweight CHF w/M4 Extension w/FSP

AR-15/M16 5.56 HAMMER FORGED BARRELS

Aero Precision M4E1 5.56mm NATO 18in M-LOK Upper Receiver Rifle Length 1-7 Twist 1/2x28 15in M-LOK Handguard Gen 2 Cerakote Flat Dark Earth

Aero Precision AR15 Stripped Upper Receiver Uncoated

Aero Precision M5 Threaded Stripped Upper Receiver Uncoated

AERO PRECISION VG6 Gamma 556

Mrp-L M-Lok 5.56mm Assembled Upper Receiver - Mrp-L M-Lok 5.56/300 Blk 9.25'''' Assembled Upper Receiver

LMT Defense AR-15 Flat Top Stripped Upper Receiver

LMT 5.56 10.5" Chrome Lined 1:7" Twist 30rd

Lewis Machine and Tool MRP Gen 2 Chrome Lined 5.56 AR-15 Piston Barrel - Carbine - Medium - 12"

Lewis Machine and Tool Flat Top Barreled AR-15 Upper Receiver - 5.56 - 10.5"

Lewis Machine and Tool Flat Top Barreled AR-15 Upper Receiver - 5.56 - 16"

Radical Firearms 5.56 AR-15 Barrel Assembly With Zero Impulse Brake and Gas Block - Mid-Length - SOCOM - 16"

Radical Firearms Gen 2 5.56 AR-15 Bolt Carrier Group - Nitride