ATF Says That Shouldering Shockwave Blade is Okay!

I just got off the phone with a very nice gentleman at ATF Tech Branch—who was fielding these calls today. (He was, understandably, very well versed on the subject—and very nice about it even though he’s been on the phone all day, repeating himself ad nauseam.) I identified myself and asked him specifically if the letter that’s making the rounds is limited to one company’s products–or if it applies to all pistol stabilizing braces. He said: “The letter covers all pistol stabilizing braces, including the Shockwave Blade.” So that settles that.

He then gave me a bit of further guidance for our customers:

  1. By “permanent affixing,” ATF considers that to be adding permanent Loctite to the large set screw that secures the Blade into the dimples in the KAK tube. As long as you don’t red Loctite the set screw in place, ATF considers it to be “temporarily placed” and “perfectly okay to shoulder.” (He didn’t beat around the bush on this topic.)
  2. “Length of pull”—for lack of a better word regarding pistol braces—begins to enter a “gray area” above 13.5″. Above 13.5″ begins “to enter shoulder stock area.” (His words. I believe this has to do with the “comfortableness” aspect.) On an AR-15, the “length of pull” for the Blade is approximately 13.13″, so no issues there. But if you use the Blade on a firearm that requires a large adapter of some sort, please make sure that you only use the dimples up to the point that you remain below the 13.5″ length. Stay below 13.5″ and according to ATF, it’s okay to shoulder a Shockwave Blade.

So there you have it. Anything you read to the contrary on a web forum, social media site, or industry blog is simple misinformation by people who are not being completely honest.

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  1. Johno says:

    Any updates on a printable letter?

    • marty says:

      I was most recently told by Tech Branch that ATF is working on an industry Q&A that will answer everybody’s questions. It’s described as covering all pistol stabilizing braces on the market, including the Shockwave Blade. I imagine that it will be easily printable from

  2. JohnL says:

    Thx you for keeping us in the loop, waiting patiently for letter. thx again

  3. J M says:

    Is the Blade legal without the strap, the one I bought at a gun show did not have the strap in the package?

  4. Josh says:

    So you are saying that you cannot permanently fix the blade to the buffer tube correct? If you hand tighten the blade you are fine, right?

  5. Matt says:

    So, just to be clear, the longest dimple setting in the buffer tube for the Blade is less than 13.5″?

  6. Josh says:

    It would be nice to have a genuine letter to prove to local law enforcement that it’s ok. I know it’s a case by case it seems like with law enforcement but having it for piece of mind is nice.

    • marty says:

      Hello Josh,

      The agent I spoke with said that they are going to have to issue another letter or statement—perhaps on their site—with more specific information. It sounded like the number of phone calls they received today was ridiculous.


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