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5/20/2010 11:43:04 PM EDT
couple of questions

are they pinned?
are there threads underneath?
5/21/2010 7:42:20 AM EDT
[#1]
I know that they're not supposed to be removable.  They don't just screw off like an AK slant brake.  I have seen pictures of psl's that have had the muzzle brake replaced somehow.
5/22/2010 11:20:24 PM EDT
[#2]
There are two different way it has been done. Some are threaded and some are pressed and pinned. Either one will be obvious if it's threaded it will be very much like a typical AK and if it's pressed and pinned you will see the pin going through the top side of the flash hider. You will probably not get the flash hider off if it's pinned and pressed without destroying it. I tried and finally decided to cut it off and thread the barrel. There is more than enough material to thread it with the proper 14x1 LH thread.
5/23/2010 2:59:54 AM EDT
[#3]
I have not seen any PSL muzzle that was not threaded like any other AK-style rifle.  Some have been blind pinned into the threads––which may account for the "pressed and pinned" theory–– or tack welded to make the brake permanent  and therefore "non-evil" to meet the requirements of some states still having some sort of assault weapons ban.  Most imported  PSLs sold before 2008 had standard threaded muzzle brakes while most sold after that date have had the threaded muzzles modified to make the brake non-removable.

When the brake is removed, there is about 5/8" of exposed muzzle in front of the front sight block.

HTH
5/23/2010 8:58:38 AM EDT
[#4]
Here is a link which shows the two different types of flash hiders. Mine is a 1977 rifle and was pinned. Although they are saying here the later rifles came pined and the early rifles are threaded. Your saying you have seen 2008 rifles with threaded flash hiders... I'd like to find a correct threaded flash hider to replace the one I removed which was pressed and pinned in place. Anyone know who has these?
5/23/2010 9:01:58 AM EDT
[#5]
Quoted:
.. or tack welded to make the brake permanent  and therefore "non-evil" to meet the requirements of some states still having some sort of assault weapons ban.  Most imported  PSLs sold before 2008 had standard threaded muzzle brakes while most sold after that date have had the threaded muzzles modified to make the brake non-removable.

HTH

Yeah lets all give Uncle Sam a big round of applause for keeping us safe from those dangerous threaded muzzles! Between that and bayonnet lugs, I'd be losing sleep worried scared....
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