[ARCHIVED THREAD] - M-4 upper

Posted: 9/9/2003 8:40:23 AM EDT

Just picked up my M-4 today(had it built)the upper has a mini y-comp that seems to be machined into the barrel.Any one know who makes these?

Posted: 9/9/2003 8:50:27 AM EDT

[#1]

An Integral Y comp type brake?
Definetly a Model 1 Sales upper. 1/9 twist chrome moly.

Posted: 9/9/2003 9:08:23 AM EDT

[#2]

I measured it it's 16in. w/brake.Are these M-1 sales uppers good?

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