Features

• Antiwalk trigger pins and screws
• Improved Bolt Catch 
• Enhanced Power Bolt Catch Spring
• Magazine Catch Assembly: Improved Milspec Magazine Catch Bar, Enhanced Power Spring, and Improved Button
• Hogue Grip
• Take Down/ Pivot Pins
• All Detents and Springs for Lower Assembly
• HiperFire Trigger Group
• Safety Selector
• Buffer Tube (Milspec AR15)
• 308 Carbine (short 2.5") Buffer 3.8oz  
• 308 Carbine Spring

Optional Features

• Adaptive Tactical Ex-Performance Stock
• SB Tactical SBA3 Arm Brace

Notice

The beef-up kit must be installed in the lower to maintain function of your GEN-12 upper. If they are not installed then you may have magazines fall out, have the bolt prematurely open, or break a trigger pin during firing. Apply blue thread locker to the screws of the antiwalk pins during installation and torque to 6 in-lbs, and be sure to let cure entirely before shooting.