Muzzlebreak is just for looks and something to grab onto to cock the gun. I actually bored it to within a 1/2" of the end so the ports do nothing at all....the Air still exits at the end. But they do look cool.

Josh I have an automotive machine shop

( meaning I build engines...performance.....restoration.......rebuilt )

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Whenever I get some time I started making my own muzzlebreak and barrel shrouds and just have to get them out to be anodized 

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Most of the stuff I've been making is for the HW 30's and R7's