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Gun Fun: Fostech Outdoors Bumpski Stock

Gun Fun: Fostech Bumpski Stock - TheArmsGuide.com

April 3, 2013 by Kevin 14 Comments

One of my favorite firearm accessories is the Bumpski stock. In these times of limited ammo accessibility, it’s not an addition to my rifle that I’d consider “practical,” but it is hard to beat in terms of range fun. Fostech Outdoors’s Bumpski stock is a billet aluminum stock with two functions. In fixed position, it works just as any standard fixed rifle stock for an AK (it fits both the 47 and the 74, as long as the original stock isn’t an underfolder or side folder). However, the cool function (and the reason they sell like hotcakes) is how it facilitates bump fire. The Bumpski has two main components: the fixed attachment that connects to the rifle receiver, and a butt/shoulder/pistol grip component that slides back and forth over the receiver attachment with the force of recoil.

I’m a cross dominant shooter, and fortunately for me, the Bumpski is ambidextrous. Moving the cheekweld and switching from a right to a left handed trigger bar are the only modifications necessary (which entails using an allen wrench and about 40 seconds of effort) to swap the stock from right handed to left handed function.

To use the Bumpski while in the bumpfire configuration, the shooter shoulders the rifle as they would for regular fire, and places their trigger finger on the trigger bar. During fire, the recoil moves the rifle backward along the stock, when it reaches the end of the stock, it bounces back forward. That forward motion pushes the trigger up against the shooter’s finger, depressing it and initiating the cycle again. This allows the shooter to “pull” the trigger more rapidly than with regular fire, allowing a semi automatic rifle to simulate full auto fire (the Bumpski facilitates fire around 650 rounds per minute – pretty cool, if you have the ammo). Despite the high rate of fire, it is surprisingly easy to control. The rate of fire can also be controlled using the rifle’s forend. (I found it somewhat easier to manage this when shooting a rifle with a vertical foregrip, but it wasn’t what I’d consider a challenge using a standard AK foregrip.)

Running an AK bumpfire style is the fastest way I know to burn through ammo, short of firing a fully automatic, but that novelty makes it an absolute blast. However, if you desire a more practical disposal of your 7.62×39 (or 5.45×39, if firing an AK74), you can still use the Bumpski stock. Simply lock it in fixed position and remove the trigger bar. Voila, standard function rifle.

Before trying out the Bumpski, I had never bumpfired any firearm, so I can testify to the Bumpski’s ease of operation. Check out this post’s video to vicariously enjoy my full-auto fire simulation fun.

Filed Under: Gear Tagged With: 5.45x39, 7.62x39, AK, AK47, AK74, ammo, auto, bumpfire, Bumpski, Fostech, full, gun, Outdoors, rapid fire, rifle, shooting, stock

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About the Author

Avatar for Kevin

Kevin Kevin is an avid hunter and military history enthusiast. He participates in WWII reenactments every year and boasts a large antique firearms collection. The Winchester 1873 and Colt M1911 are two of his favorites. Kevin enjoys researching the best products on the market to keep The Arms Guide reader up to date and informed.

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Comments

  1. Avatar for KevinSavageHenry says

    April 3, 2013 at 3:30 pm

    if only ammo wasn’t crazy these days…

    Reply
    • Avatar for KevinFateofDestinee says

      April 3, 2013 at 4:51 pm

      SavageHenry I know, right? :/

      Reply
      • Avatar for KevinUllr says

        April 4, 2013 at 12:47 pm

        FateofDestineeSavageHenry  Thank God for bumped Rugers (http://fostechoutdoors.com/shop/index.php?l=product_list&c=2) and GunBot (http://gunbot.net/ammo/22lr/).  
         Might not be as fun as a Bumpski but better than nothing, eh?

        Reply
      • Avatar for KevinUllr says

        April 4, 2013 at 12:47 pm

        FateofDestineeSavageHenry  Thank God for bumped Rugers (http://fostechoutdoors.com/shop/index.php?l=product_list&c=2) and GunBot (http://gunbot.net/ammo/22lr/).  
         Might not be as fun as a Bumpski but better than nothing, eh?

        Reply
        • Avatar for KevinFateofDestinee says

          April 4, 2013 at 5:50 pm

          Ullr FateofDestinee SavageHenry I’d love to get their AR bumpfire stock… but it’s just not a purchase I can justify at the moment.

          Reply
  2. Avatar for Kevinpeter3101 says

    April 3, 2013 at 4:37 pm

    Does butinski have a bumpski? They look a lot of fun, would be worth getting before the grabbers black list them.

    Reply
    • Avatar for KevinFateofDestinee says

      April 3, 2013 at 4:52 pm

      peter3101 lol She probably puts it under her list of things she considers “death machines.” She’s silly like that.
      Yeah, these things are a party a minute. I hope I can hang on to mine >.<

      Reply
      • Avatar for KevinJoeFabeetz says

        April 3, 2013 at 7:33 pm

        FateofDestinee peter3101 She has one.  She’s just not telling anyone that she does.  😉

        Reply
  3. Avatar for KevinJoeFabeetz says

    April 3, 2013 at 7:39 pm

    You had fun with that thing.

    Reply
    • Avatar for KevinFateofDestinee says

      April 4, 2013 at 5:49 pm

      JoeFabeetz That’s an understatement ;D

      Reply
    • Avatar for KevinFateofDestinee says

      April 4, 2013 at 5:49 pm

      JoeFabeetz That’s an understatement ;D

      Reply
  4. Avatar for KevinAceP says

    April 9, 2013 at 5:50 pm

    FateofDestinee What issues have you run into being cross dominant? I have always shot right handed and only recently found out I’m left eye dominant. I still carry on the right, but have been working to teach myself to shoot more ambidextrously – it’s slow going. I’d love to see an article on cross dominant training.

    Reply
    • Avatar for KevinFateofDestinee says

      April 9, 2013 at 7:09 pm

      AceP FateofDestinee I agree! Sounds like an excellent article topic. Stay tuned ;]

      Reply
      • Avatar for KevinJoeFabeetz says

        April 9, 2013 at 8:51 pm

        FateofDestinee AceP I’m left eye dominant and right handed too.  I can shoot a hand gun with either hand but not as well with me left.  Its a great idea for an article.

        Reply

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