Aero Precision APAR308554M45 M5E1 Enhanced Receiver 6.5 Creedmoor 20" Stainless Steel Barrel, 7075-T6 Aluminum Black Anodized Receiver, Aero Gen2 Enhanced Free-Floating M-LOK Handguard for M5 Platform $769.99
Aero Precision APAR600201AC M4E1 Enhanced Receiver 5.56x45mm NATO 7075-T6 Aluminum Black Anodized Receiver for AR-15 $199.99