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Posted: 10/21/2002 3:55:00 AM EDT
[Last Edit: 10/21/2002 4:07:32 AM EDT by Gecko]
I just purchased a pre-ban Colt SP1. I would like to take a spare 16" flattop upper and convert it to pre-ban to use on this gun. Really, the only thing I want to do to this upper is add a 3 prong flash hidder.

The barrel diameter on the crown end is approximatly 11/16" which runs 3/4" toward the receiver and then the barrel becomes about 2/16" larger. Can you get a flash suppressor that will fit on this barrel without having to have the barrel milled clear down to 1/2? What is the normal procedure for doing this, eg adding a flash hider on this size of barrel?

Thanks
Link Posted: 10/21/2002 6:45:11 AM EDT
Either buy a threaded barrel, or have yours threaded.
Link Posted: 10/21/2002 3:20:03 PM EDT
It is not milled. It is turned down in a lathe. Only the end tip is turned down and threaded. All M16 flash hiders have the same 28-1/2" threading.
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