5.56x45mm NATO Upper Receivers

Spikes Tactical Upper 5.56 11.5in FN CHF w/13.2in BAR2 Rail

Spikes Tactical Upper 5.56 11.5in FN CHF w/12in BAR2 Rail

Spikes Tactical Upper 5.56 11.5in FN CHF w/10in BAR2 Rail

Spikes Tactical Upper 5.56 11.5in FN CHF w/BLK MOE Handguards & FSP

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/13.2in SAR3 Rail w/ Vortex

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/10in SAR3 Rail w/ Vortex

Spikes Tactical Upper 5.56 11.5in FN CHF w/7in SAR3 Rail & FSP

Spikes Tactical Upper 5.56 18in LW SPR w/13.2in SAR3 Rail

Spikes Tactical Upper 5.56 8.1in CHF Barrel w/7in SAR3

Spikes Tactical Upper 5.56 14.5in 16in OAL Midlength Lightweight LE w/13.2in SAR3 Rail w/ Vortex FH

Spikes Tactical Upper 5.56 14.5in 16in OAL Midlength Lightweight LE w/12in M-LOK Rail w/ Dynacomp

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

Spikes Tactical Upper 5.56 16in Midlength LE w/13.2in SAR3 Rail

Spikes Tactical Upper 5.56 16in Midlength LE w/10in SAR3 Rail

Spikes Tactical Upper 5.56 16in Midlength LE w/10in M-LOK Rail

Spikes Tactical Upper 5.56 16in M4 LE w/13.2in SAR3 Rail

Spikes Tactical Upper 5.56 16in M4 LE w/ 12in SAR Rail

Spikes Tactical Upper 5.56 16in M4 LE w/9in M-LOK Rail

Spikes Tactical Upper 5.56 16in M4 LE w/12in M-LOK Rail

Geissele Automatics Super Duty Assembled AR-15 Upper Receiver - DDC

Geissele Automatics Super Duty Assembled AR-15 Upper Receiver

Stag 15 223 Varminter Upper Receivers - Stag 15l Left Hand Varminter Upper

Stag Arms AR-15 16 5.56 Tactical M-LOK Rifle Right-Handed Upper Assembly - FDE

Stag Arms AR-15 16 5.56 M-LOK Midlength Right-Handed Complete Upper - FDE/Phosphate-Chrome Lined