Techt G4/G3 Spec-R L7 Bolt Engine Factory Spare Parts Output: 10-32 female

Output: 10-32 female

Now you can shoot like a pro on your way to becoming one

E-grip sear (this sear just has a round hole in the middle of it not as lot or oval)

The all new Delrin bolt with a pull pin top cocking knob makes it easy to clean the breach of the marker in between games

This product works best with VFC / Elite Force MP5 Magazines

Techt G4/G3 Spec-R L7 Bolt Engine Factory Spare Parts Output: 10-32 femaleThe 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