Aero Precision M4E1-T SM15 PRO Complete Upper 5.56 x 45 16.3inch Mid Length 1-7 Twist 1/2 x 28 Thread Anodized Black APUG700105M103-1. 56 Cold Hammer Forged Barrel that is paired with our PRO 5.56 BCG. Included ATLAS R-ONE Handguard BREACH Charging.
Determined at checkout.
