Quote:
Originally Posted by m102404
short answer is yes. Same with AEGs...but with a GBBR you have the bolt essentially pounding on the chamber/barrel...which would add stress to an already stressed part. There's more than one person who has ended up with cracked receiver threads...either from over tightening, or over tightening and then eventual failure.
If you take a close look at the stock out of the box setup, you'll note that there is an o-ring set on the out barrel and it's captured by the delta ring. That ring is there (IMO) for two reasons...1) to provide a "squish" fit for tightening things down...2) to provide a bit of a bumper to take up shock (this one is a fuzzy guess).
I've run many rounds with the front end built up with 1) oring...2) AEG barrel shims...3) nothing. Currently I run it with an oring in place.
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It's running with an O-Ring in place, and it doesn't take too much force to tighten it even more, so I should be okay.