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2/9/2014 8:23:30 AM EDT
I got an AR on trade without doing my homework.  The upper is a VLTOR MUR-1 and the barrel is a CMMG 300BLK.  It came with a hundred supersonic rounds, but it's a pistol length gas system.  CMMG says not to shoot these bullets thru this barrel 'cause of the gas system length.  From what I've read I need a carbine length gas system for the supersonics or it'll over-gas.  I have no intention of suppressing it.  So I have a few questions...

a)  Is shooting supersoninc blackouts in a pistol length system RARELY (like one box every once in a great while) dangerous and/or stupid?
b)  Should I install a low-profile adjutable gas block, or just replace the barrel, OR just simply buy slow heavy rounds?  
c)  I've built an UMP and an Uzi, can an average Joe with a little garage smithing experience but NO AR15 experience replace the block or barrel himself (aka: no lath or hard to find tools?
d)  I assue either way I'm pulling my compensator off then back on?

Sorry for the newb questions, sorry for the CMMG barrel (hahaha), any thoughts?

Thanks...
2/9/2014 8:26:45 AM EDT
[#1]
What is the barrel length?  Is this an AR Pistol or rifle?
2/9/2014 10:28:22 AM EDT
[#2]
Quote History
Quoted:
What is the barrel length?  Is this an AR Pistol or rifle?
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Yeah, sorry.  It's a 16" rifle.
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