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X-SHIM AR-15/M16

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Product Description


By simply installing the X-SHIM on the Rear & Front lugs on the upper receiver, the "slop" found on many rifles can be reduced or eliminated. Removal of the slop can result in increased accuracy and more reliable feeding.

The X-shim will work with the following platforms.

  • AR-15 rifles
  • M-16 Full Auto rifles


Included in the kit are the following items.

  • Front set for AR-15 / M-16
  • Rear set for AR-15 / M-16
  • Set of gauges to check tolerence

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Product Reviews

Showing reviews 1-5 of 13 | Next

  1. Best solution that I've found 5 Star Review

    Posted by on 9th Jun 2017

    I have a Spikes lower that had some slop with my BCM upper. I tried some oversized pins, but they didn't quite take out all of the play so I put in a accu-wedge as well. This still left the play some play even though the rattle noise was gone. I was on the verge of buying a billet lower when I decided to try these out. Within 2 minutes all of the play was gone. That rifle took the tan set, another took the blue set, and my third took the remaining two stacked on each other. Now I've got three slop free rifles without excessive pressure on the takedown pin. I could not be happier with them.

  2. Great Product! Works Wonders! 5 Star Review

    Posted by on 15th Apr 2017

    Needed something for my front wiggle and these x-shims did the trick. They did exactly what they say they do and I have no more wiggle! I'd refer this product to anyone with upper and lower receiver wiggle.

  3. Works Great!!! 5 Star Review

    Posted by on 24th Jan 2017

    After building my AR, it was very loose. This product tightened my AR right up. Will definitely buy again.

  4. Great product! 5 Star Review

    Posted by on 3rd Jan 2017

    Takes that wiggle most AR lower and upper have. Solid and feels right now. Would recommend this to anyone that has that problem

  5. Great way to tighten up your AR15 5 Star Review

    Posted by on 22nd Dec 2016

    This is a great way to tighten up your upper and lower receiver. I have a LWRC M4A2 SPR. I had to use the .002 and .004 to tighten it up. Easy to install in minutes. The only thing I can think of a couple things to make this even a better. First one would be making the shims sticky so they stay in place. Second thing would be the color. It would be nice to have these either available in black or clear so you can't see them after it's installed.

Showing reviews 1-5 of 13 | Next

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