This complete threaded barreled upper comes with side EZ cocker and Integral machined rail for optics. The side cocker makes it easier to pull back the bolt and accommodates lots of room on top of the scope rail for your optics of choice. For use with a Mac-10 9mm. Please contact us if you have any questions. (other components sold separately) Mac-10 9mm barrels are getting more expensive and tougher to find, get yours today while they last!**BACK ORDER ONLY
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