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Integral
I was wondering about this topic also. How would you do the gas block on an integral rifle?
The 9mm does not have a gas block. I would bet your barrel is held in by the suppressor assembly. That way you never have a SBR. If the suppressor is off, the barrel is not secured.
On the 300 whisper, if you assembled it with the short barrel and BEFORE you put the can on it, it would be a SBR. I have been trying to figure out how you could do a integral can on a gas operated barrel.
The only way I can think of right now is to have the can start after the gas port and be welded to the barrel.
Remember, if the barrel can be secured during assembly without the can making it 16", it is a SBR. Wouldn't want to chance it with the ATF.
Brian.
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Threaded Mode