Techt G4/G3 Spec-R L7 Bolt Engine Factory Spare Parts integrated into an interchangeable dual

integrated into an interchangeable dual density carrier

Cell Size: AA

Heavy-duty Velcro wrap closure with elastic

Variable Tension Trigger Spring Set Included

Techt G4/G3 Spec-R L7 Bolt Engine Factory Spare Parts integrated into an interchangeable dualThe TechT G3 Spec R G4 L7 Bolt Engine totally reconfigures the Stock G3 Spec R G4's method of operation. By replacing the stock style bolt with the proven L7 style bolt head, performance is increased on every level. Lower operating pressure, shorter dwells, better consistency, better efficiency, lower sound signature the works. It is constructed of high grade aircraft aluminum and goes through our licensed anodizing method to make them both durable