Armalite def15 sporting rifle.223 16" bbl.30-rd pmag FEATURES-16" chrome lined/chrome moly barrel-1:7" twist-Matte black polymer stock-Single stage trigger-Flash suppressor-Gas block with Mil-Std 1913 rail-Forged flat top upperreceiver with Mil-Std 1913 rail-Forged 7075-T6 aluminum lower receiver-One 30-round Magpul PMAG Other Features: Chrome moly & lined gas block with mil-std 1913 rail, forged flat top w/ rail single stage trigger m203 step down barrel anodized finish on upper and lower receiver, manganese phosphated steel barrel adjustable stock 1-30 round magpul pmag