Gas Port Sizes/Gas Block Question

[LRRPF52]

Not for a Grendel, but an adjustable gas key should enable slowing down the bolt unlocking without affecting the amount of rearward force applied to the BCG for cycling, right? I'm getting there, but still dealing with some case head abuse on my 22 Nosler.....

There isn't rearward direct impingement force on the AR15 BCG, but internal expansion in the chamber formed by the bolt tail and gas ring flange, as well as the rear chamber wall in the bolt bore of the carrier.



As the gas expands, it causes the carrier to move rearward since that is the path of least resistance.

An adjustable gas key will limit the volume of flow per time into that Stoner expansion chamber, causing later movement than normal. Basically trying to time the system with choked gas flow back at the key.

Go to the wildcats section and start a threat if you need trouble-shooting with the Nosler.