The V7 Weapon Systems GI Titanium Barrel Nut For AR15 Style 5.56/.223 Rifles will fit your Bushmaster AR 15 223 if there is nothing about your bushy that is not mil standard. If your rifle is mil standard there will be zero issues. Remember, the "GI" in the name of the product stands for "general issue". You're safe with this product. Order it so we can ship it. :)
Tactical Link