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Aero Precision M4E1 Threaded No FA Complete Upper 16" 5.56 Mid, 15" M-LOK ATLAS S-ONE - Anodized Black - APAR7
Rosco Manufacturing K9 11.5" 5.56 NATO Nitride 416R Stainless Barrel for AR-15
Bushmaster 0040017BLK QRC Complete Upper 5.56x45mm NATO 16" CMV Nitride Barrel, Black, Flat Top Aluminum Rec, A2 Fl
Rosco Manufacturing K9 13.95" 5.56 NATO 416R Stainless Nitride Barrel for AR-15
DPMS Panther Arms Kitty Kat 5.56 NATO 7.5" Upper Receiver Black Nitride
Rosco Manufacturing Bloodline BL-16-HB-556-7-C 16" 5.56 NATO Heavy Barrel Nitride 4150 CMV for AR-15
Wolf Performance A1 Complete Upper 12.5" 5.56 NATO 1:7 Piston Driven
Rosco Manufacturing Bloodline 5.56 NATO 14.5" Nitride Barrel - BL-145-M4-556-7-C
DPMS Kitty Kat C7 AR Upper 300 Blackout 7.5" Black Nitride/Hard Anodized Finish.
DPMS Kitty Kat AR-15 Upper, 5.56 NATO, 7.5" Barrel, Black Nitride Finish, 6.5" Quad Rail, DP51655207090.
CMMG Barrel Sub-Assembly 55DE10A 16.1" 5.56x45mm NATO 4140CM Nitrided M4 Profile for AR-15.
CMMG Barrel Sub-Assembly 55DC70A 16.1" 5.56 NATO 4140 Chromoly Nitride AR-15 Compatible