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Aero Precision M4E1 Enhanced Complete Upper, 16" 5.56 HBAR MID-Length Barrel with 15" Enhanced Quad Rail Handg
DPMS Panther Arms Kitty Kat 5.56 NATO 7.5" Upper Receiver Black Nitride
Rosco Manufacturing Purebred PB-16-HB-300BLK-8-P 16" 300 Blackout 416R Stainless Bead Blast AR-15 Barrel
Rosco Manufacturing Bloodline BL-16-HB-300BLK-8-P 16" Barrel 300 Blackout 4150 CMV Nitride AR-15 Compatible
Rosco Manufacturing Bloodline BL-16-HB-556-7-C 16" 5.56 NATO Heavy Barrel Nitride 4150 CMV for AR-15
DPMS Kitty Kat C7 AR Upper 300 Blackout 7.5" Black Nitride/Hard Anodized Finish.
DPMS Kitty Kat DP51655170308 AR-15 Compatible Upper 300 Blackout 7.5" Barrel Black Nitride Finish.
Aero Precision M5 18" .308 SS Fluted Complete Upper Receiver with 15" ATLAS S-ONE Handguard - Anodized Black
Aero Precision M5E1 Complete Upper, 18" .308 SS Fluted Barrel, EM-15 Handguard - Anodized Black - APAR308554M69
Aero Precision M5E1 Enhanced 24" 6.5 Creedmoor Stainless Steel Complete Upper Receiver with 15" Enhanced M-LOK
Aero Precision M5 24" 6.5 Creedmoor SS Complete Upper Receiver with 15" ATLAS S-ONE Handguard - Anodized Black
Aero Precision M5 24" 6.5 Creedmoor SS Complete Upper Receiver with 15" ATLAS R-ONE Handguard - Anodized Black
Aero Precision M5 22" 6.5 Creedmoor SS Complete Upper Receiver with ATLAS S-ONE Handguard Anodized Black - APAR5381