Spikes SFT50M4 Flat Top Stripped Upper Multi-Caliber 7075-T6 Aluminum Black Anodized Receiver for M4 Platform $103.50
ZEV UR556FOR Forged Upper Receiver 5.56x45mm NATO 7075-T6 Aluminum Black Anodized Receiver for AR-15 $128.38
Aero Precision APAR501603C Stripped Upper Receiver Multi-Caliber 7075-T6 Aluminum Black Anodized Receiver for AR-15 $76.49
Aero Precision APAR501603AC Assembled Upper Receiver Multi-Caliber 7075-T6 Aluminum Black Anodized Receiver for AR-15 $93.49
Aero Precision APAR501801C Stripped Upper Receiver Multi-Caliber 7075-T6 Aluminum Flat Dark Earth Cerakote Receiver for AR-15 $89.24
Spikes STU5435MLS Complete Upper 5.56x45mm NATO 16" Black Phosphate/Midlength Barrel, 7075-T6 Aluminum Black Receiver, 12" SAR3 Free-Floating Handguard for AR-15 $630.00
Aero Precision APAR501801AC Assembled Upper Receiver Multi-Caliber 7075-T6 Aluminum Flat Dark Earth Cerakote Receiver for AR-15 $106.24
Wilson Combat TRUPPER Forged Upper Receiver 5.56x45mm NATO 7075-T6 Aluminum Black Anodized Receiver for AR-15 $84.95