PALMETTO STATE ARMORY (PSA) OPTICS READY CARBINE w/6-POSITION CAR STOCK - CALIFORNIA APPROVED - INCLUDES BULLET BUTTON•Semi-auto   •CMV 4150 steel constructed & chrome-lined barrel features  M4 profile & black matte phosphate finish   •Dust cover   •Brass deflector   •Forward assist   •Carbine-length gas port   •1:7 RH twist   •7075-T6 aluminum M4 flat-top Mil-Spec upper is hard coat anodized black & equipped w/extended feed ramps, engraved T-marks, standard M4 handguard w/double heat shield, & forged F-marked front sight post & A2 flash hider   •7075-T6 aluminum forged lower is black hardcoat anodized & features standard PSA fire control group w/combat trigger, A2-style grip & aluminum trigger guard   •Mil-Spec carpenter 158 steel constructed bolt features parkerized finish   •Gas key secured w/(8)