Our AR-9 Glock style “Lock-Back” Stripped Lower Receiver is manufactured to Mil-Spec standards and is the ideal solution for your next custom AR-9 build! It is forged from 7075-T6 aluminum in the standard Mil-Spec pattern to ensure a tight fit for upper receivers configured to receive a Glock style lower. This AR-9 Lower features an integrated “lock-back” function which provides indication when the last round has been fired and the chamber is empty. Meant to be combined with standard AR-15 style uppers, this AR-9 9mm lower is a perfect compliment to all CBC 9mm uppers. Hard coat anodizing provides wear resistant protection. Made in the USA!