The spc-a4 is the perfect rifle for both novice and veteran ar shooters.This firearm features a 16 chrome lined m4 profile barrel, 15 troy m-lok battle rail, mil-spec trigger, m4 style 6-position collapsible stock, and a 30 round troy battlemag. Action: Semi-Auto Caliber: 223 Rem Barrel Length: 16 Capacity: 30+1 Trigger: Mil-Spec Oal: 36 Weight: 6.60 lbs Stock Description: Collapsible Receiver Material: Aluminum Sights: Flip Up Front & Rear Barrel Description: Chrome-Lined M4 Profile Twist: 1:7 Barrel Length Range: 16 to 16.99 Weight Range: 6 lbs to 6.99 lbs Hand: Right Stock Finish Group: Black Metal Finish Group: Blued/Black