AR-15 assault rifle, also known as the M4 Carbine chambered in caliber 5.56mm (.223 Stock Photo - Alamy
M4 Vs AR15 - Comparison - Sniper Country
Colt M4 Carbine Review: A Classic AR-15 :: Guns.com
EMG SAI Licensed GRY SBR AR-15 / M4 AEG Training Rifle w/ i5 Gearbox (Configuration: CQB / Grey ITAR Furniture), Airsoft Guns, Airsoft Electric Rifles - Evike.com Airsoft Superstore
With AR-15s, Mass Shooters Attack With the Rifle Firepower Typically Used by Infantry Troops - The New York Times
Custom M4 AR15 Carbine 5.56 NATO - FFM INC
Del-Ton AR-15 M4 Rifle Parts Kit w/ Magpul Black Furniture
Colt CR6920 M4 Carbine AR-15 5.56 NATO Semi Auto Rifle 16.1" Barrel 30 Rounds A2 Front Sight Polymer Hand Guard Collapsible Stock Matte Black - Duke's Sport Shop, Inc.