Which AR Pistol Set Up

The guy that made the barrel is making me a new one. The spacer will work if it is not threaded. Already tried my ar spacer for 1/2 x 36. Did not work. However the crush washer may work. Tried it and it appeared to work. Going to check with liberty tomorrow though.

If you are talking about using a crush washer in place of a spacer, do not do it. You can not guarantee it will be perfectly even all the way around, and if you have any type of cant, you could have a baffle strike.
 
The guy that made the barrel is making me a new one. The spacer will work if it is not threaded. Already tried my ar spacer for 1/2 x 36. Did not work. However the crush washer may work. Tried it and it appeared to work. Going to check with liberty tomorrow though.

don't use crushwashers, spacers are perfectly flat, crushwashers aren't
 
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