Guns in 5.56x45mm NATO

PSA 16" Mid-Length 5.56 NATO 1/7 Nitride 13.5" Lightweight M-Lok MOE EPT Rifle w/MBUS Sight Set

PSA 16" M4 Carbine-Length 5.56 NATO 1/7 Nitride Lightweight M-Lok Classic Rifle - 5165450254

PSA 16" Mid-Length 5.56 NATO 1/7 Nitride Freedom Rifle, Olive Drab Green - 5165450007

PSA PA-15 16"Nitride M4 Carbine 5.56 NATO Classic AR-15 Rifle, FDE

PSA PA-15 16" Nitride M4 Carbine 5.56 MOE EPT AR-15 Rifle, OD Green

PSA AR-15 Pistol 5.56 10.5" Carbine 1/7 Nitride LTWT M-Lok MOE EPT SBA3 Pistol

PSA PA-15 16"Nitride M4 Carbine 5.56 NATO MOE EPT AR-15 Rifle, FDE

PSA AR-15 Classic Lower With SB Tactical Adjustable Brace, Black

BLEM PSA PA-15 5.56 AR-15 Rifle 16" Nitride M4 CRBN 13.5" M-LOK

PSA PA-15 16" Nitride M4 Carbine 5.56 NATO Classic AR-15 13.5" M-Lok Railed Rifle

PSA PA-15 16" Nitride A2 Mid-Length 5.56 NATO MOE EPT AR-15 Rifle, FDE

PSA PA-15 16" Nitride M4 Carbine 5.56 NATO MOE EPT AR-15 Rifle, Black

PSA AR-15 Complete MOE EPT Pistol Lower with SB Tactical PDW Pistol Brace, Black - 516446451

PSA PA-15 Classic AR-15 Rifle 5.56 16" Nitride M4 Carbine, Black

PSA AR-15 "M4 CARBINE" Stripped Lower Receiver

BLEM Harrington & Richardson Government Carbine, Pencil Profile, A2 Rifle, Black

Blem Harrington & Richardson 723 Style Carbine 5.56 Rifle, Black

Harrington & Richardson Retro M16A1 Lowers Receiver, Gray, Blem

Blem Harrington & Richardson M16A2 Lower Receiver Black

Colt Firearms AR6720 Lightweight LE Carbine Black .223 / 5.56 NATO 16.1-inch 20Rd Carry Handle

Colt M4 Commando 5.56mm Semi-Auto Lower Receiver Assembly With "LE" Prefix

Aero Precision 16" 5.56 NATO 30Rd Semi-Auto M4E1 Threaded Complete Rifle - Black