Headspace on AR rifles...

[Annihilator]

An Official Journal Of The NRA | Headspace on Rifles

Think twice before switching out bolts on your AR. There may be some “headspace” issues.

www.shootingillustrated.com

 

[Talyn]

Always a factor on bolt guns, but have had only one problem out of many ARs.

 

[TEXASforLIFE]

I had 2 Grendels that were too tight that the go gauge wouldn't go and 1 Creed. The Creed was easily resolved.