Customer Reviews

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  1. Simple, Yet Satisfying
    100%
    Barrel nut shims are not the first thing thing - or even the 7th thing you think of when installing a new quad-rail or keymod handguard onto your rifle, but they go a long way to help time things and make them line up with your receiver.

    I try to keep a couple handy so I can tweak and customize my rifle, or the rifles of buddies and keep the spacing and everything lined up.

    Review by

    Posted on

  2. Good shims
    100%
    Maybe you'll be lucky, and that barrel nut for your new handguard will line up perfectly without being timed?
    I wasn't so lucky, but these fixed me right up. Good, quality shims.

    Review by

    Posted on

  3. Time saver
    100%
    I bought 2 sizes of these so I would prepared for my new handguard install. Works as they should, no issues.

    Review by

    Posted on

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Barrel Nut Shim

In stock
SKU
688763004092
From CA$3.37

OK so you're playing with your new build and son-of-a-bee-itch. The hand guard don't fit, the barrel nut, she ain't in the right position. That's OK, these little guys will help more things forward a bit properly without the need to Macgyver a solution. Similarly, if you can't get your gas tube through the barrel nut without uncomfortably exceeding the torque specs, try inserting one or more of these until the alignment gets closer to perfect.

If you're trying to time a barrel nut, we did the math based on a standard 18 tooth per inch barrel nut. These are estimates only, real world results may vary depending on moon phase.

  • 0.3mm shim makes approx a 1/5th of a rotation
  • 0.5mm shim makes approx 1/3 a rotation
  • 0.9mm shim makes approx 1/2 a rotation
  • 1.95mm shim makes approx 1 and a 1/3 rotation

Pro Tips for JR Carbine users: The super thick 1.95mm shims are perfect for building up the receiver boss on a JR carbine. Two shims should work for our free-float lightweight handguards, or one 1.95mm plus one 0.9mm shim does the job for a super (clamp-style) freefloat handguard.

Features:
  • Weight: 2.6 pixie farts
You get:
  • (1) Shim. Colors/materials vary but it is some form of steel
Compatible with:
  • Mil-Spec and aftermarket barrel nuts
  • All AR-15 barrel extensions
  • All AR-15 upper receivers