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AR-15 Bolt Issue?

Discussion in 'Gunsmithing and Repairs' started by G11354, Nov 15, 2012.

  1. G11354

    G11354 Well-Known Member

    My rifle is a Smith & Wesson M&P15 chambered in 5.56mm. Been having issues with the bolt not catching the first round when released and not locking open after the last shot.
    Shoots just fine, no jams or other obvious issues.

    Been shooting hand loads and some factory loads. Seems more common with hand loaded rounds. Hand loads contain 22.2 gn and 22.3 gn of IMR 3031 with 60 gn Hornady V-Max, was experimenting with different charges.

    I have used two different magazines and experienced this issue with them all.

    Any input would be greatly appreciated.
    Last edited: Nov 15, 2012
  2. walking arsenal

    walking arsenal Well-Known Member

    Sounds magazine related. Have you tried different mags and if so what brand are you using?
  3. G11354

    G11354 Well-Known Member

    I have used a 30 round Magpul P-MAG and a 20 round Colt magazine.

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