renegadecow Posted November 18, 2015 Report Share Posted November 18, 2015 About a year ago I was messing around with a pneumatically timed training grenade I developed but couldn't find that old thread for the life of me. Anyhow, I ran into some consistency (timing) problems due to DIY tools and basically needed a machine shop to make the pistons for me which I wasn't all interested in investing in. Fast forward to today, I've instead changed my old design to a drop or impact activated system and I'm a lot happier with the results. Function wise, it's dead simple. There's no more need for an air seal so the piston is made into a straight up striker by omitting the o-ring. It's pre-cocked and held back when the two halves of the handle are closed around the main body. When dropped the handle separates, freeing the striker and hits the primer on the screw-on cap. It's still bare bones right now and am still fiddling with some things like spring tension and a better way to secure the pin. Link to post Share on other sites
hitmanNo2 Posted November 18, 2015 Report Share Posted November 18, 2015 I remember posting in that thread but can't find it either. I'm glad you're still toying with it. Link to post Share on other sites
shmook Posted November 18, 2015 Report Share Posted November 18, 2015 Was it called a bamse? Anyway, great work. Yet again! Link to post Share on other sites
johny_blaze Posted November 18, 2015 Report Share Posted November 18, 2015 The Bamse one was from a guy from Sweeden and was made of CO2 capsule and bicycle tube. Link to post Share on other sites
renegadecow Posted November 19, 2015 Author Report Share Posted November 19, 2015 Thanks! Yeah, the Bamse is something else. I just gave up trying to make a catchy name for this one because I suck at acronyms. I've just made one small change so far, added an o-ring as a buffer so the locking lugs don't get mangled (they're very soft aluminum) when the nade is dropped head first. Otherwise it's just about final and already started painting it. Instead of devising a fancy 2nd safety pin I'll just be rolling the handle with newspaper and some tape which is slipped off to arm. Link to post Share on other sites
renegadecow Posted November 19, 2015 Author Report Share Posted November 19, 2015 Ok. I may go with Breach Bang Clear for the name. While I'll be selling these locally, I'll post how-to images when I start the production run so everyone can equally loose their hearing. Link to post Share on other sites
paranoiddroid Posted November 19, 2015 Report Share Posted November 19, 2015 WANT!!!! I will definitely be interested in guides because I now have a mate with a machine shop who can make stuff for me. Link to post Share on other sites
renegadecow Posted November 19, 2015 Author Report Share Posted November 19, 2015 You can make one with a drill and a hacksaw really. With a machine shop you could make one in metal. Now, off topic in my own topic, what's the most powerful speaker that can be crammed into something this size? And just how loud can it be when set on an impact relay switch to play the John Cena theme? Link to post Share on other sites
hitmanNo2 Posted November 19, 2015 Report Share Posted November 19, 2015 Can you get some videos of them in action? Link to post Share on other sites
renegadecow Posted November 19, 2015 Author Report Share Posted November 19, 2015 Can do. I've arranged to borrow a camera with decent slow mo on Sunday. Link to post Share on other sites
hitmanNo2 Posted November 19, 2015 Report Share Posted November 19, 2015 Nice. I appreciate differences in costs for parts in different countries but how much do you reckon they cost to make? Link to post Share on other sites
renegadecow Posted November 20, 2015 Author Report Share Posted November 20, 2015 Just material cost? Under $10. But if you add in labor I'm looking at charging $50 over here. With proper equipment (like a machine shop) and you can shrink that through volume to maybe $30. Link to post Share on other sites
renegadecow Posted November 20, 2015 Author Report Share Posted November 20, 2015 Also, to the American crowd, I know the ATF sees these as firearms even if they're only using primers instead of blanks. But the law also allows civilians to manufacture their own guns without need for licencing so long as they are for personal use and not meant for resale. Link to post Share on other sites
calbur20 Posted November 22, 2015 Report Share Posted November 22, 2015 Video of the said grenade in action. Link to post Share on other sites
hitmanNo2 Posted November 22, 2015 Report Share Posted November 22, 2015 Nice. I'm trying to come up with an easy way to make the side covers captive. I guess just attaching with a thin cord would do the trick. Link to post Share on other sites
renegadecow Posted November 23, 2015 Author Report Share Posted November 23, 2015 The bottom length of the covers don't really matter so you can extend the overhang some more and just drill a hole through it with a fishing line running through. But they don't fly more than a foot away which is why I didn't really bother with it. Link to post Share on other sites
RedRob Posted November 24, 2015 Report Share Posted November 24, 2015 Looks great! Are you going to post up a "How to" guide? I think anchoring the covers is a good idea - it's going to be chucked into a room and then potentially knocked around by the occupants/assaulters. I'd probably add some luminous or bright colouring to the main body to make it easier to find as well. Link to post Share on other sites
renegadecow Posted November 24, 2015 Author Report Share Posted November 24, 2015 I've already started taking pics while making a large batch but it will be a little while before I get to compile everything into a step by step process. Just to add, a few people at a local FB group expressed their concerns about using primers. While having them on you isn't violating any law, most gun shops will ask for a license when you go and buy them making them largely inaccessible to non license holders plus reselling primers requires a special business license equal to having an actual gun shop. So I've thought to develop a version that uses red caps for cap guns. A single cap isn't much but using three at a time is about equal to a small handgun primer and I'm guessing 5-6 will be on shotgun primer levels. The problem is making all of them fire at the same time if at all so the best solution I could think of is to manually cram the contents of multiple caps into one single loaded cap. Link to post Share on other sites
PMO Gordo Posted November 24, 2015 Report Share Posted November 24, 2015 I've already started taking pics while making a large batch but it will be a little while before I get to compile everything into a step by step process. Just to add, a few people at a local FB group expressed their concerns about using primers. While having them on you isn't violating any law, most gun shops will ask for a license when you go and buy them making them largely inaccessible to non license holders plus reselling primers requires a special business license equal to having an actual gun shop. So I've thought to develop a version that uses red caps for cap guns. A single cap isn't much but using three at a time is about equal to a small handgun primer and I'm guessing 5-6 will be on shotgun primer levels. The problem is making all of them fire at the same time if at all so the best solution I could think of is to manually cram the contents of multiple caps into one single loaded cap. May I suggest trying the "adult snappers" instead of cap gun caps? They are the souped-up version of party snappers. They produce noises about 4-5 times of caps, but are still safe - watch the video below. They are categorized as novelties at some US states, and ground fireworks at others. The differences are accessibility and use requirement. Here is a place I bought them from several times: http://www.pyrocreations.com/inc/sdetail/567/81003 Link to post Share on other sites
renegadecow Posted November 24, 2015 Author Report Share Posted November 24, 2015 We have something similar, but aren't loud at all. The red cap option is really just to cater to a wider audience if I were to make a whole lot more. Link to post Share on other sites
heroshark Posted November 24, 2015 Report Share Posted November 24, 2015 how about a few paper caps layerd up, I know if you take a hammer to a full reel its pretty loud . Link to post Share on other sites
renegadecow Posted November 24, 2015 Author Report Share Posted November 24, 2015 Same effect. More of the good stuff = more boom. Not sure if we have those here though. Link to post Share on other sites
heroshark Posted November 24, 2015 Report Share Posted November 24, 2015 I've also picked out and layered up red caps as a kid but it is a pita. Link to post Share on other sites
hitmanNo2 Posted November 24, 2015 Report Share Posted November 24, 2015 What about using model gun caps? You can stack them pretty easily. Link to post Share on other sites
renegadecow Posted November 24, 2015 Author Report Share Posted November 24, 2015 Japanese PFCs? Nowhere to buy them from here and when I tried Rakuten they said they can't ship them. At any rate, the red caps are cheap here, like 25 cents for a blister pack of 9 8-shot rings. I'll try emptying the contents of one whole ring into one cap tomorrow and see how it fares. Link to post Share on other sites
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