BudsGunShop.com - QUESTION REGARDING AMMO 223 VS 556 IN AN AR15.
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IF A CALIBER 223. IS NOTED CAN THE 556 AMMO BE FIRED FROM THE AR15. AND CONVERSELY THE OTHER WAY AROUND? THE DESCRIPTION IS CONFUSING. THANK YOU.
1 Answer
Smith & Wesson M&P15 Sport II 223 Remington/5.56 NATO AR15 Semi Auto Rifle
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Basim, this rifle is stamped 5.56NATO so it will safely fire both 5.56 and .223. If a firearm barrel is only stamped .223 then it is generally considered to not be advisable, due to safety/warranty reasons, to fire 5.56 ammunition. 5.56 ammo is loaded to higher pressure than .223 ammo.