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gemtech

  1. .300 blackout, subsonic Gemtech ammo

    I guess about a year ago now, I purchased 1000 rounds of "GEMTECH SUBSONIC 300BLK 187GR" I run two different .300 blackout AR's, so I think that may be why I didn't notice it until now. When ever I use this Gemtech ammo in one of my rifles, the bolt refuses close all the way and I then have...
    • JLas
    • Thread
    • 300 ammo blackout blk gemtech subsonic
    • Replies: 3
    • Forum: Firearms Chat
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