New Designz G3, Spec-R, G4 Performance Backcap

The New Designz G3, Spec-R, G4 Performance Backcap allows for reduced input pressure, dwell settings, quieter operation, and overall better performance.

Features:

• Improved efficiency --  higher shot count and shot to shot consistency
  

• Reduced internal friction
  

• Ramped exhaust ports -- better air flow
  

• Spiral/ vortex milling
  

• Tuned porting 
  

• Adds 10-15+fps over stock bolt guide
  

• NO tools needed
  

• Includes all o-rings and installed bumper