GR21 Rail for the Glock 20 & 21


The GR21 Recover Rail is engineered to fit perfectly on any Gen 1 and 2 Glock 20 and 21 pistol without a factory rail.

(9 reviews)

Frequently Bought Together



  • Most stable rail solution for the Glock 21
  • Easy to install with the supplied hardware
  • No modifications to your Glock required, will not damage your firearm


  • Glass reinforced polymer
  • Weight 25 gr


  • Place the two halves of the rail together in position on the gun
  • Secure together with the supplied hardware
  • For further instructions visit our YouTube channel


Recommended Holsters available from:

9 reviews for GR21 Rail for the Glock 20 & 21

  1. A.J. Kritzman

    Works as advertised. Can’t ask for more than that. Easy to install and just as form fitting as the Recover Tactical rail adopter for the Gen 2 Glock 17. So, breath new life into your Gen 2 Glock 21 by giving it the ability to accessorize like its younger brethren. Don’t be left in the dark!

  2. Stefan Becker (verified owner)

    (Original) Kann man nur empfehlen, absolut passgenau sieht gut aus und das wichtigste es hält.

    (Translated) I can only recommend this product, absolutely perfect fit, looks good, and most importantly, it does what it’s supposed to do.

  3. Steve Simpson (verified owner)

    I can finally put a flashlight on my G21 gen1, great product love the design and fitment. Works perfect with 45acp but when I switch to my .22 slide it binds and doesn’t allow the slide to close. Another issue I came across is no options for a case other a custom case . they sell cases for the g21+olight PL mini 2 but the the adapter on there it lowers the light down an additional 1/4 in or so… Recover Tactical has a slick clip holster but with the addition to that the light would have to relocate..

  4. Bob Crumley (verified owner)

    Fast delivery, fits perfectly and looks great. I’ll be really happy if and when Olight sends the laser/light I ordered more than two weeks ago…

  5. Karl R Hopfer (verified owner)

    It fits the G21 perfectly. Took all of 5 minutes to mount. I installed a tactical light with laser on the rail without issues. Nice tight fit with no light shake/movement. I really recommend this if you want to put a light or laser on you smooth frame Glock.

  6. Don horton (verified owner)

    Very Easy to install, took maybe 3 minutes to complete. Works great. Would buy again.

  7. William Carroccia (verified owner)

    Confused at first as it came in a box that said Glock 19, however, it has same GR21 markings as images on website so I assume it is correct. It fits well with a very small gap at bottom of the front of the trigger guard, it doesn’t impede the travel of the slide and makes it much more comfortable to shoot. I do not yet have a light for it as I am vexed on which one to get plus I have no experience shooting with lights on handguns. She will head out to the range on Sunday and see if it holds up to the recoil and muzzle blast of the big 45 ACP. I was thinking maybe some blue locktite might be in order but I did not put it on until after I see how things go Sunday.

  8. Big Mike (verified owner)

    Quick delivery and quick, easy installation. Fits perfectly. A great solution for adding a rail to a Glock 21, series 2.

  9. Brian (verified owner)

    This worked great, installation was easy, and I put and Olight flashlight/laser on it. My only complaint is that with the Olight laser I bought, the on buttons rub up against the lower part that wraps around the finger guard.

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Customer Questions and Answers

    If I put this on my gen 1 Glock 21, would I be able to use your stabilizer system on my pistol?
  1. 0 votes
    Q If I put this on my gen 1 Glock 21, would I be able to use your stabilizer system on my pistol? answer now

    It will not make it compatible

  2. Will this fit a Glock 20 first gen?
  3. 0 votes
    Q Will this fit a Glock 20 first gen? answer now

    Yep, as long as it doesn't have a built-in rail

  4. Do you make a rail adapter for the Glock 21SF? Or for the Walther PPK/s?
  5. 0 votes
    Q Do you make a rail adapter for the Glock 21SF? Or for the Walther PPK/s? answer now

    The GR21 will fit all versions of the 21 that do not have a rail. We don't have anything for Walther at the moment.

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