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Been there, done that (With Magpul PTS).
Won't fit, get a G&P GBBR lower.
Never heard of a 'acm' UBR, but i wouldn't touch it. Nothing compares to the real Magpul stuff.
Cheers.
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Quote:
Originally Posted by Mr.Shiney
Yes it is hard to find an Instructor that teaches how to Finger, Suck, Squeeze and Blow all at the same time.
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