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by upc it is a A2 not a A3 (typo) specs Specifications and features: Bushmaster A2 Heavy Barrel semi-automatic carbine .223 Remington/5.56x45mm NATO 16" heavy-profile chrome-lined barrel 1:9" twist with 6 grooves & lands 30 round magazine A2 upper receiver with fixed carry handle and rear sight Two piece, plastic handguards 7075 T6 aircraft-grade aluminum upper & lower receiver Manganese phosphate-coated Hard-anodized mil-spec finish Standard single-stage trigger Black M4 collapsible buttstock A2 flash suppressor Accepts all M16 and AR-15 magazines 34.75" overall length 7.28 lbs unloaded