DIY Bumpfire Stock

The gun store guys put together one with parts you can find at any hardware store:

Testing it out:

Wow, that works really well.  I’ve seen bumpfire stocks people have made in the past, but they all looked pretty unsafe to me.  This one looks a lot safer since the bump shaft is metal and secured on really well.  The one thing A person could probably do to make it safer would be to put an endcap on the end of that bump shaft so you couldn’t loose control and have the glock slip off.

Thoughts?

27 COMMENTS

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Bull May 1, 2012 at 02:20 am

how would this be classified legally? is it a “stock”?

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ENDO-Mike May 1, 2012 at 01:38 pm

No it’s not connected, so it’s not classified as anything.

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Phil May 1, 2012 at 06:43 am

No thanks. Looks like that thing could easily spin around and shoot you in the face if you slipped.

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Mark May 1, 2012 at 10:52 am

That was my first thought. The board would need to have some metal added to it to hold the pistol in place so it doesn’t rotate upward or downward. Maybe just 2 more shafts that the grip goes in between.

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032125 May 1, 2012 at 03:45 pm

Yeah, if you have the grip of a toddler, you might let go. It’s still just a 9mm pistol, girls. Also bear in mind that the weight of a pistol is all in the back, so the minute you let go the pipe will hit the front of the trigger guard, not the trigger.

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Phil May 2, 2012 at 06:45 am

I didn’t know James Yeager was here.

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Frank May 1, 2012 at 07:27 am

Doesn’t attaching a stock make it a SBR?

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MrMaigo May 1, 2012 at 08:20 am

As long as people never see it, who’s to know? …whoops…

gunstock – noun
“The stock or support in which the barrel of a shoulder weapon is fixed.”
It isn’t attached and doesn’t seem to support the gun, not that I would argue that to the ATF.

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DeskJockey May 1, 2012 at 09:49 am

I’m not quite sure how these work, so I googled ‘bump shaft’. Big mistake. Apparently there are a lot of questions people have regarding “bumps” on “shafts”.

Still not sure how these work.

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MrMaigo May 1, 2012 at 10:10 am

You push the trigger forward onto the bar but not hard enough as to prevent the recoil from pulling the trigger away from the bar and resetting.

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032125 May 1, 2012 at 03:47 pm

Awesome. Naive Googling often painfully reminds us of Rule 34.

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Louie j May 1, 2012 at 09:52 am

Looks like you have put a shoulder device on a handgun I would not want to be around when ATF comes calling. You might want to do some research on converting a handgun to an Short barreled rifle

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DeskJockey May 1, 2012 at 10:27 am

I think the ATF would classify it as a machine gun. Either way, you’re probably looking at doing some time or paying a fortune in fines and legal fees.

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Jim May 1, 2012 at 10:49 am

Silly question, but what use is a bump board?

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ENDO-Mike May 1, 2012 at 01:39 pm

Silly question is right! Did you watch the 2nd video? :P

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Dontshootmebro May 1, 2012 at 10:50 am

Interesting. I think you avoid the SBR issue as the shoulder mount is not affixed to the pistol. Bump stops have been in the clear in the past, and were not classified as class III. The trigger is being depressed each time the weapon discharges a round.

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Church May 1, 2012 at 03:36 pm

Don’t these guys preach against dumb things? I mean, the footage of it shooting is cool, if you take out all of their hillbilly talk that comes with it. But this seems like a bad idea as many posts above me agree with.

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ENDO-Mike May 1, 2012 at 03:44 pm

True. Those guys do seem a bit hypocritical about a lot of things. This is one of them, that you would expect them to make fun of.

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Vhyrus May 1, 2012 at 07:35 pm

It is not affixed in any permanent or semi permanent way so it is not an SBR. It fires 1 shot for every trigger pull and does not use any external elastic or spring force, so it is not a machine gun.

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Jim P. May 1, 2012 at 10:48 pm

The thing that I noticed is that the target hit ratio was about 1 in 5 to 1 in 10.

I’d rather hump in 100 rounds of ammo and have a 1 to 1 or 1 to 1.5 round on target and survive than to dump 33 rounds rounds downrange and have maybe 7 rounds impact the target and then be sucking for bullets.

Anyone who tells you there is accurate fire in full auto is bullshitting you. The only time full auto actually works is against something like a zombie mob (aim for the head) or firing an M-60 over/into the enemy. But if you look at the stats — the life of an M-60 gunner in a combat zone is less than 60 seconds. Something about the 18’+ muzzle blast has a tendency to draw the eye.

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Bart May 2, 2012 at 01:22 pm

Did they just… Put a stock on their glock…-_-… New business Mike, selling pro bump boards for glocks and not permanent stocks. You could totally make one with a real stock on it. That would be awesome.

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ENDO-Mike May 3, 2012 at 01:52 pm

haha no doubt, I could design a pretty pro looking bump board!

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CHAOS May 2, 2012 at 06:02 pm

Having shot an actual full auto glock 26(video on YT), I fully approve of such shenanigans. I’d probably use something a little stronger than PVC for the actual trigger press bar thing… aka a nipple (where the hell did barry come up with that for a name of a pipe)

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Josh A. May 3, 2012 at 12:41 pm

CHAOS – a short length of pipe is called a nipple… Usually they come pre-cut as opposed to cutting and threading from a full stick. This looks like fun!

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opiv6ix May 4, 2012 at 07:11 pm

http://www.slidefire.com is the commercialized version of this. My understanding is that the NFA issue wouldn’t be attaching a stock that allows bump-firing. BATFE is allowing that. The NFA issue would be attaching a stock for a gun with a barrel shorter than 16″. Again, just my understanding. Of course, I have wondered for a while how you can attach an AR-15 stock to your Glock without a tax stamp as well (ENDO sells the adapter for this).

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david robinson December 19, 2014 at 12:28 am

I never had the chance of purchasing a bump fire product. Why? Because just before entering my personal credit card information, and because their site appeared a bit suspicious once I neared completion of my order, something didn’t look right. I decided to check out the SSL security they use. A system responsible for safeguarding yours and my credit card information. I found data that suggested that it did not protect you the consumer once your information was entered. Because I was concerned I sent bump fire an email hoping they would reply to my concerns. Instead, they not only did not return answering my concerns. I was blocked from contacting them. Oh, and not only blocked. When I attempted to I was bombarded with unflattering comments that popped up after I entered my email address. When I first sent them an email I was respectful. Their answer to my respect was total dis-respect. I predict that this company will not be around very long. REMEMBE, IF YOU HAVE PUT YOUR CREDIT OR DEBIT CARD INFORMATION OUT THERE WITH THIS COMPANY, YOU MAY VERY WELL BE HACKED SOMETIME IN THE FUTURE. YOU COULD WAKE UP SOME MORNING OWING THOUSANDS OF DOLLARS OR WITH AN EMPTY CHECKING ACCOUNT. THINK BEFORE DEALING WITH THIS COMPANY. ONE WHO HAS ABSOLUTELY ZERO RESPECT FOR ITS CUSTOMERS CONCERNS.

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sfarley January 22, 2015 at 06:44 am

Seriously…
1) “Swimming is just stupid. All your doing is trying to not drown”
“Have you ever been in a pool?”
“No”
2) Trampolines are just stupid. All you’re doing is jumping and trying not to fall off, and they just aren’t practucal.”
“Have you ever been on one?”
“No”
My point is that full – auto and/or bump fire aren’t as stable as a single shot platform (duh)…but DAMMIT, they sure are fun!

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