Failure to eject/ bolt stuck

[NugginFutz]

Of all the FTE / FTF issues I've read about, it seems like gas block alignment is the most common issue reported or discovered. I saw these gizmos a few years ago and wondered why I never thought of it.

For anyone assembling an upper, this is something I would highly recommend. Takes ALL the guesswork out of the equation.

https://hbindustries.net/store/shop/ar15...er-5-56mm/

https://hbindustries.net/store/shop/ar15...er-7-62mm/


I suspect the .30 cal pins can be used in the Grendel. If not, then a simple heat and shorten operation will do the trick.