Russian 762X54r Mosinnagant Headspace Nogo Gage

A no-go gauge is the gauge that is used to measure the maximum allowed headspace. When you place the no-go gauge in the rifle nad close the bolt, the bolt should not close and lock. If the rifle does close on the no-go gauge you may have a problem that needs to be tended to by a gunsmith and may be an unsaef weapon to fire.

For your safety and others, please check headspace on your mosin nagatn before firing it. Complete instructions are available upon request.