SINCE 2012


NITRO FIN 1.3, Tanfoglio and CZ, Slide Lock Thumb Rest

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NF17-4 TF-CZ
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Product Description

-2/27/2024:  Black is back.. sorry for the delay.

-01/26/2024:  Stock is hitting the low limit again, order before BSPS gets to the table.

-NITRO FIN THUMB REST 1.3 For Old and New imports of the Tanfoglio and CZ pistol.

Do still perform a slide off fit check in the frame before doing a full assembly.  Like all custom parts some fitting could be needed, but we did our best to hopefully eliminate that.

The Pin size is 0.196, ALL 1.3 versions have been treated with Black Nitride for durability.

Machined out of one solid piece of 17-4 stainless.  Based on the very popular Nitro Fin for the 2011 guns.  In most applications if your pin size matches....all you have to do

is slide your old slide stop out, slide this one in, and you have a thumbrest on your Limited or Open USPSA gun. This product has been tested in EAA Witness Tanfoglio LIMITED, STOCK I II III, Witness Match, CZ Shadow 2, CZ SP01, CZ75 and CZ75b firearms.  Read below!!!

PLEASE READ: Check your current slide lock for pin size.  Use caution test fitting it before test firing at the range.  The Nitro Fin by design fits close inside the slide lock relief of the frame, some gun smith work may be required.

Slide lock does not lock the slide back on last round or manually.

Slide lock does not lock the slide back on last round or manually.

Slide lock does not lock the slide back on last round or manually.

Shooting Sports Innovations stands behind all of its products.  If you have an issue, let us know.  However, firearms are inherently dangerous and must be treated with respect at all times.  Please make sure you are fully familiar with your firearm, how to use it safely, and that you follow the four rules of firearm safety at all times.  Shooting Sports Innovations cannot and will not be held responsible for any negligent use of any firearm or Shooting Sports Innovations products.


  • 5
    Nitro Fin/ thumb rest

    Posted by Drew A. on May 20th 2024

    Have this item in almost all my CZs and just bought another for my Tangfolio. Works really great!

  • 5
    Shadow2 thumbrest

    Posted by Alphacharlieproduction on Feb 16th 2024

  • 5
    Nitro 1.3

    Posted by Eugene on Jan 15th 2024

    Fits my stock master nicely, and feels good and ergonomic for a large hand.

  • 5
    CZ Nitro Fin

    Posted by John on Dec 25th 2023

    Best and most comfortable thumb rest, I have found. Outstanding product & fast service.

  • 5
    Nitrofin on CZ TS2

    Posted by Cole White on Oct 7th 2023

    Bought the base model TS2 for USPSA limited division, thought about milling the slide for a thumb rest. Found this product and it slide right in, no milling, no 6 week wait time for someone to work on the gun. Perfect for what I wanted and fits well. Best of both worlds.

  • 5
    Nitro super fin

    Posted by Kyle Hoskison on Sep 7th 2023

    The fin is great. It takes some getting used to but I think it will make me faster. It’s very well built and solid.

  • 5
    Nitro Fin CZ

    Posted by Tom Face on Jun 29th 2023

    Very nice looking part that installed without any modifications. It looks like it came on the gun, CZ75 SP01, from the manufacturer. Very happy with the position for my support thumb.

  • 5
    Amazing thumb rest

    Posted by Brion Thorman II on Jun 12th 2023

    One of the best I ever owned

  • 5
    Cz nitro fin

    Posted by Nathan on Jun 3rd 2023

    Obviously a 5 star review. I knew what I was getting into and as advertised, awesome product. Like everyone else, I wish this locked the slide back but I also live in the real world. Thanks SSI for a great product. My review is from June of 2023. This fin has stood the test of time.