Slide Fire Solutions Suing Bump Fire Systems

It’s a battle between barely-legal bump-fire stocks. Slide Fire Solutions, makers of a patented bump-fire floating stock, are suing Bump Fire Systems, makers of the very similar (and much cheaper) AR15 BFSystems stock. Kevin’s Tech Ramblings covers the issue in greater detail.

While the Slide Fire product retails for around $300, the Bump Fire stock costs about a third of that. I am not the person to ask about patent law, but it does seem as though the BFS product is very similar to the Slide Fire stock.

Thanks to Kevin for the tip.

Nathaniel F

Nathaniel is a history enthusiast and firearms hobbyist whose primary interest lies in military small arms technological developments beginning with the smokeless powder era. In addition to contributing to The Firearm Blog, he runs 196,800 Revolutions Per Minute, a blog devoted to modern small arms design and theory. He is also the author of the original web serial Heartblood, which is being updated and edited regularly. He can be reached via email at


  • Zachary marrs

    Well, form does follow function…

    • Geodkyt

      And if the form you need to use to achieve a particular function is one that is patented by someone else for that function, you can’t just copy their design and sell it as your own. Not until the patent expires.

      Or, you can try to work a deal with the inventor, the guy who spent time and money developing the design, to license it from him.

      • Zachary marrs

        No argument from me.

  • Vhyrus

    I believe this is the first time the phrase “barely-legal bum” has been used on the internet for something not pornographic.

  • Slide Fire’s probably just mad that they’re getting beat out by Bump Fire.

  • stephen

    I wonder how the other bump fire company got away with a bump fire stock since its pretty similar too? How does one get sued but not the other?

    As for price the slidefire is abourt $295 and this bump fire is $99. I thought the bump fire wouldn’t work well but this video shows a guy shooting 27 rounds in 2.82 seconds and he stays on target; granted he is only about 30′ from the target, it still works well.

    In the end its a cool toy but no real world application.

    I wonder if this lawsuit is a conspiracy to keep the populace from defending against the upcoming zombie apocalypse?

  • Marty Ewer

    It was only a matter of time, I’m afraid.

  • John

    “Barely legal” is such a buzzword. It’s either legal, or it’s not. Period.

    Then again this is the same site that says solvent traps are always illegal suppressors no matter what, so I’m not surprised.

    • JSmath

      Except what you’re saying about TFB isn’t remotely accurate. Before you post a link to the article, I read it and I actually comprehended the language being used; that’s the difference.

      Context is always important, and oversimplification is the crutch of the ignorant.

      • John

        The article I referenced said that solvent traps were “illegal to use as intended.” Last time I checked, solvent traps were INTENDED to be used to collect used solvent in oil filters for easy storage and disposal.

    • You didn’t read it through or something because that is not what was said.

      • JT

        That is certainly the way it read to me as well and I quote the title, “’Solvent Traps’ Still VERY ILLEGAL to Use As Intended”. Don’t get me wrong you guys usually do a great job but it should have been clearly stated that it is very illegal to try to use one as suppressor not to mention foolish and not the more tongue in cheek “intended use”.

        Surprisingly enough I actually have a friend who uses the occasional solvent trap for its intended purpose on big cleaning jobs and thinks someone would be crazy to attempt to fire through one for safety reasons not to mention a pointless amount dB reduction if any other than a possible redirection of sound down range like certain flash hiders do. Then there are the possible legal consequences if done without proper paperwork…

        I would also take exception with the barely legal claim. Bump fire stocks are clearly legal under current laws. You could have mentioned some specific push to change existing laws or that it is likely for a change to occur in this political environment but saying that they are barley legal is a distortion even if it is easily understood.

        As far as the patent goes I believe SFS has a very strong case with several utility and design patents protecting their product including a license deal with the Akins patent #6,101,918 and several of their own.

  • Smokey_the_Bear

    I think everyone saw this coming. I have no idea if they were indeed infringing on Slidefire’s patent, that said, I just bought one…just in case they close up shop. lol It’s hard to say no on that price point.

  • We have one of these being tested now—–

  • Cymond

    Wait, I’m confused. I haven’t paid much attention to the various bump-firing stocks, but Fostech Outdoors sued Slide Fire years ago. However, they’re both still around, and Slide Fire is now suing Bump Fire, so I guess that Slide Fire holds the patent?

    • J.T.

      I am wondering this as well. Fostech and Slide Fire must have reached some type of agreement. IIRC, Slide Fire originally tried to sue Fostech citing some of the Slide Fire patents and Fostech countersued because they were the assignee of Bill Akins’ Patent No. 6,101,918. Now in this suit Slide Fire is saying they are the assignee of the 918 patent. My best guess is that Fostech sold Slide Fire the 918 patent in exchange for being able to use all of Slide Fire’s patents.

  • jeff

    this looks nothing like the sfs stock! just because it operates the same does not mean it infringes on a patent. thats like glock suing sig because they both have grips. they are two totaly different products with the same mode of operation. mabey sfs has a utility patent but i dont think it would infringe on a design patent ? im no lawyer but it seems that sfs is just mad

  • santi

    You know, it is unrelated but I do wish they would the design the stock to be more streamlined. Its fairly gaudy looking.

  • John

    The main problem with these things for a lot of people is that there is essentially no place to use them. I live walking distance from the mostly the best indoor range in the country (NRA HQ) and there’s no way they are allowing this (although they do allow full auto by appointment). I own the bumpfire systems for $99, but it’s essentially a nice paper weight.

    • FWIW

      If you don’t mind driving another 15 minutes or so, I would check out Silver Eagle Group out by the airport. I’ve been there a few times and there were people using both bump fire and FA stuff no problem. Might be worth giving the RSO a heads-up about in advance of course.

      • Gcracker3000

        Just move to the country. You’re the range officer & can fire as fast as you want. Forget about paying a range to shoot guns & ammo you’ve already paid for. BTW, Go Bump Fire!!

  • echelon

    Well if Magpul’s gonna roll that way then SlideFire has to as well, I guess.

    When in doubt, sue them out. New American Business Motto.

    *Disclaimer: I have previous dealings with SlideFire that have left a bad impression of them so this really doesn’t surprise me in the least.

  • John Yossarian

    Patents are just another means of Government-sponsored price fixing. They interfere with the open market. This stock can obviously be sold at $100. But the price will be fixed at $300 if SlideFire gains the monopoly.

    R&D is not worth a 300% mark-up into perpetuity. In a free market, you get to sell your stock for $300 until you can’t. Then you get to sell it at $100 until you innovate some more.

    This here is just putting a gun to the consumer’s head and saying “No choice, Joe!”

    • Except patents *don’t* last “into perpetuity” — they are specifically time-limited.

  • spencer60

    I hate that this is happening. The Slide Fire stocks are ridiculously overpriced, but this is exactly what patents are for… right or wrong.

  • valorius

    The slide fire is vastly, ridiculously, perversely overpriced.

  • Justin

    One company suing another for copying their product.. what else is new??

    Free market system is a great thing. SlideFire stocks that retail for $349 are a waste of plastic (both figuratively and literally) and ammo costs. They have 6 of them collecting dust at my lgs since no one wants to buy them at such a high price.

    Along comes another company that makes the same bump-fire stock for much less, and SF tries to sue, because they’re product is being undercut in pricing? typical…

  • Trace810

    bfsystems> slide fire solutions….great job bump fire systems for producing a product that works for the 3rd of the price of slide fire solutions.. great job guys