5.56x45mm NATO Upper Receivers

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/9in BAR2 Rail w/ Vortex

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/12in BAR2 Rail w/ Dynacomp

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/Mid Length Handguards w/ Vortex

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/ML Hanguard and Dynacomp Muzzle Device Black

Spikes Tactical Upper 5.56 14.5in 16in OAL Midlength Lightweight LE w/12in BAR2 Rail - w/Dynacomp Ext.

Spikes Tactical Upper 5.56 16in Midlength LE w/13.2in BAR2 Rail

Spikes Tactical Upper 5.56 16in Midlength LE w/12in BAR2 Rail

Spikes Tactical Upper 5.56 16in Midlength LE w/10in BAR2 Rail

Spikes Tactical Upper 5.56 16in Midlength LE w/9in BAR2 Rail Black

Spikes Tactical Upper 5.56 16in M4 LE w/13.2in BAR2 Rail

Spikes Tactical Upper 5.56 16in M4 LE w/10in BAR2 Rail

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

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 LM8MRP Upper Receiver 30rd 12" 5.56x45

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"

American Tactical M4 Stripped Upper Receiver

Phase 5 Weapon Systems Inc Complete P5T15 Rifle Upper Assembly 5.56mm 16 Inch Chrome Lined Barrel

Phase 5 Tactical A3 Flat Top Upper Receiver