* * NEW IN BOX * *
Complete Uppers - Include Bolt Carrier Groups and Charging Handles
Anderson
Aero Precision
Ballistic Advantage
Bushmaster
Black Rain Ordnance
HM Tactical
Radical
Smith & Wesson
Zavair Arms
Twist rates include: 1:7, 1:8, 1:9, 1:12
Calibers include: 5.56, 300 Blackout, 410 guage and 9mm
.