GC_UPC Aero Precision M4E1 Enhanced 10.5" 5.56 Barrel Complete Upper Receiver $496.99 - show more like this 14.84 GrabAGun.com GC_UPC M4E1 ASSEMBLED UPPER RECEIVER 10.5'' 5.56MM CARBINE LENGTH MAP APAR640221M2 show more like this 14.95 TheGunDock.com GC_UPC M4E1 ASSEMBLED UPPER RECEIVER 10.5'' 5.56MM CARBINE LENGTH MAP APAR640221M2 show more like this Free shipping over $400 (Excludes Ammo) Gman Sport GC_UPC Aero Precision M4E1 Complete Upper Receiver, AR-15, 10.5 in Rifle Length Barrel, 9 in M-LOK Handguard, No BCH/CH, Anodized, Black, APAR640221M2 $534.99 APAR640221M2 show more like this Dvor GC_UPC M4E1 Enhanced 10.5" 5.56 Barrel Complete Upper Receiver with 9" Enhanced Gen 2 M-LOK Handguard - Anodized Black - APAR640221M2 $534.99 APAR640221M2 show more like this Calculated in Cart Classic Firearms GC_UPC Aero Precision M4E1 Complete Upper Receiver, AR-15, 10.5 in Rifle Length Barrel, 9 in M-LOK Handguard, No BCH/CH, Anodized, Black, APAR640221M2 $534.99 APAR640221M2 show more like this Free Shipping on most orders over $49 Optics Planet GC_UPC M4e1 Assembled Upper Receiver 10.5'' 5.56Mm Carbine Length 100025505 $538.13 100025505 show more like this Firearms $18.45, Free over $500 Shooting Surplus GC_UPC Aero Precision M4E1 Complete Upper Receiver, AR-15, 10.5 in Rifle Length Barrel, 9 in M-LOK Handguard, No BCH/CH, w/ Sig Sauer ROMEO5 1x20mm Red Dot Sight, Anodized, Black, APAR640221M2-KIT1 $559.99 APAR640221M2 show more like this Dvor GC_UPC Aero Precision M4E1 Complete Upper Receiver, AR-15, 10.5 in Rifle Length Barrel, 9 in M-LOK Handguard, No BCH/CH, w/ Sig Sauer ROMEO5 1x20mm Red Dot Sight, Anodized, Black, APAR640221M2-KIT1 $559.99 APAR640221M2 show more like this Free Shipping on most orders over $49 Optics Planet