I already have the 223 and 300 uppers in this build, so I contacted MAS to see if they could produce it in 9mm. Their answer "give us 15 minutes and it will be up on the site." and it was. I paired this upper with a RRG lower and there is no play and the accuracy from this barrel is just as phenomenal as it is with the other uppers I have received from MAS. The MAS BCG runs sweet I ran 200 rounds through the platform without a single problem. If you want an accurate shooter then this is the company for you.
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