M249 Hollow Grip Bolt and Nut JACK Being a dual solenoid

Being a dual solenoid

This delrin spacer allows the G&G SR-25 (GR25) to be used with traditional M4 series hop-up chambers in place of the original proprietary chamber

This is made possible by its intelligently laid out design which minimizes dead volume resulting in better air flow

How does it work

M249 Hollow Grip Bolt and Nut JACK Being a dual solenoidThis bolt and nut comes standard with our M249 series HPA engines and replaces the original grip bolt in your A&K or Classic Army M249 Mk46. The bolt being hollow allows the air line to pass through the center of the bolt so the air line can exit the replica through the grip instead of needing to drill a hole in the gun's body.