TDS Posted February 3, 2009 Report Share Posted February 3, 2009 1. A hicapa valve would work, hicapa's aren't going anywhere, however do some testing you may need to have a stronger valve spring since gbb's usually have fairly weak valve springs (the slide takes the hammer pressure off the valve but in a NBB it has to spring back against the hammer spring in most designs) 2. This would be really difficult for me to figure out without seeing the design, really all you need is a threaded hole anywhere on the hammer assembly that a screw can go into and we put washers on, an ounce or two is a huge difference. But don't wrack your brain over it it isn't a huge deal but if it was doable easily it would be nice, some sort of adjustment is a must though, if its an adjustable hammer spring, or adjustable weighted hammer, or simple a pcs style "setscrew in the nozzle restricts gas flow" As long as it isn't "field adjustable" so someone can't crank it up on the field it wont panic event organizers. Your target market is a "dmr" (if a field allows it) or a sniper, which puts you in a pretty broad 400-600/.2 fps range. Its pretty hard to make that broad of a market happy without adjustment. Link to post Share on other sites
Username_Here Posted February 5, 2009 Report Share Posted February 5, 2009 Thought of putting one of these in a KA SVD Dragunov? With just an upgraded spring in my rifle, 80-90yrd shots are no surprise at all with it. It would be amazing if we could have that in a semi auto gas system. Link to post Share on other sites
MagnumBB Posted February 9, 2009 Author Report Share Posted February 9, 2009 TDS I'll keep with the 1911/Hi-capa magazine valve then, I figure everyone will be able to easily and cheaply get new ones to tinker with. As for restriction, I really haven't thought about it because I've been mainly working on getting the system up and running. You are very right about being adjustable though, besides something like the cold shot. I might tinker with a rudimentary regulator or flow controller or just have the unit preset for a certain fps with green gas via a restricted nozzle block or etc. Username_Here Shoot me a PM so I have your name on file. I was wondering how I could adapt this system into other guns, such as the KA SVD ( or the RealSword one when its released) or even sr25's/sr16's. The drop into a G3 platform would be easy as well. Update Because I am a hands on type of fellow. After a concept drawing is drawn up, I proceed to cut the unit from foam and basically do a mock up to see if the movement and timing works. After foam is done, I proceed to make a unit out of delrin and see how it holds up. Right now I've been jumping back and forth between foam and delrin in the past couple of weeks to get things smooth out. One thing I have noticed is that the trigger will sit slight further out to allow trigger travel. This is pretty typical of a NBB system. I will try my best to minimize the movement as well keep things comfortable for users. Once I have a working prototype that I am satisfied with, I'll probably have an open poll to find out interest. If I only build 100 units, the price will be higher than I want. If I can get interest for more, the economies of scale will kick in and it'll be much better for everyone. Basically, I want to at least break even and not have 100 extra units sitting around. But I guess this will also be based upon a performance... Link to post Share on other sites
black shot Posted February 9, 2009 Report Share Posted February 9, 2009 with the realsword one you might even be able to adapt your cold shots using real steel parts which would be very cool Link to post Share on other sites
Username_Here Posted February 10, 2009 Report Share Posted February 10, 2009 If it will aslo help, Ill send plenty of pictures of the internals and cavity of receiver with a measuring tape next to them. Link to post Share on other sites
gisburn20 Posted February 14, 2009 Report Share Posted February 14, 2009 If this is a drop in I'll have one (TM M14 style) , and if the unit is smaller (without the motor gage section) maybe it would fit in a real steel M14/ M1 / Garand stock? I would love a skirmishable 6mm gas Garand! Jim Link to post Share on other sites
MagnumBB Posted February 20, 2009 Author Report Share Posted February 20, 2009 If this is a drop in I'll have one (TM M14 style) , and if the unit is smaller (without the motor gage section) maybe it would fit in a real steel M14/ M1 / Garand stock? I would love a skirmishable 6mm gas Garand! Jim I fully intend to have the unit be a direct drop in to the TM M14 and its derivatives. The way I plan on making this work, cut costs and make it brutally simple to use is very similar to what escort wanted to do with their now defunct drop in gearbox design, have it positioned in-between two plates. my ultimate goal is to be able to strip out the original gearbox. drop this unit in. remove the previous electrical wire setup and replace the battery with a gas tank. All while being able to hit the desired 500fps with no possibility of mechanical failure compared to doing the same with a traditional gearbox. Link to post Share on other sites
Panzergraf Posted February 24, 2009 Report Share Posted February 24, 2009 A guy in Norway put the internals from a Kokusai Crimebuster NBB in a V2 mechbox shell to create an NBB SCAR L. Something similar should be possible with the V7. You could even make several different kits, for the V7, V3 and V2. I'd jump all over an NBB G3 myself, and an NBB kit for the RS SVD could be popular too, not to mention the M14. Link to post Share on other sites
MagnumBB Posted February 24, 2009 Author Report Share Posted February 24, 2009 A guy in Norway put the internals from a Kokusai Crimebuster NBB in a V2 mechbox shell to create an NBB SCAR L. Something similar should be possible with the V7. You could even make several different kits, for the V7, V3 and V2. I'd jump all over an NBB G3 myself, and an NBB kit for the RS SVD could be popular too, not to mention the M14. Yup, also a CA.net member was able to make it work in a modified V2 gearbox and dropped it into a SR25 body too, I believe his name is Blake? As of now, The M14 is my first goal. Afterward would be a v2 gear box for g3's m4's. The real sword would have to be last, considering no one has handled one yet The real hold up for these projects so far has been buying the needed guns... Link to post Share on other sites
black shot Posted February 24, 2009 Report Share Posted February 24, 2009 I'd be willing to allow you to use my scar as a test platform Link to post Share on other sites
MagnumBB Posted February 24, 2009 Author Report Share Posted February 24, 2009 I'll keep that in mind... I wonder if there is a gearbox difference between the Scar-L and the Scar-H... Link to post Share on other sites
black shot Posted February 24, 2009 Report Share Posted February 24, 2009 I don't think there is but I know that the loop that normally sticks out of the V2 shell isn't present in the SCAR gearboxes Link to post Share on other sites
Panzergraf Posted February 25, 2009 Report Share Posted February 25, 2009 I don't know about the VFC, but the CA SCAR H uses an elongated V2, like the SR-25. Link to post Share on other sites
TDS Posted February 25, 2009 Report Share Posted February 25, 2009 The real hold up for these projects so far has been buying the needed guns... Name it and I probably have it Link to post Share on other sites
MagnumBB Posted March 18, 2009 Author Report Share Posted March 18, 2009 I just got my hands on a donor gun and things are taking shape. after all this work, I have no idea if machining this will be affordable or not... machinist are asking allot even for my base setup. unless i get my order numbers to < 400 pcs, I don't know if this will be feasible or not. Link to post Share on other sites
MagnumBB Posted June 18, 2009 Author Report Share Posted June 18, 2009 Time to Necro post... A recent Pm has brought this back into my mind. I recently found a new source of funding, aka more corporate ladder climbing, but it means I have a source to feed this crazy obsession that is Airsoft. I originally planned to have this drop in kit structured for the M14, but strategically, I believe doing a V.2 gearbox would be the wisest choice. My reasons for this are below... - Strong aftermarket support - Wider user availability - Cross platform ( swap of a piston/nozzle assembly and this will work for on G3's) Of course, I would rather not follow in the footsteps of a different NBB platform for the V.2 gearbox. On the other hand, I have a perfectly performing AtoZ SVD sitting in a teammate's closet. With the upcoming release from A&K, this would be a prime platform to base a NBB system on, adding Semi-auto capabilities to a gun that rightfully deserves such capability. ( For those of you who want a GBB, sorry, my system is technically a Blow Forward system) My question to you, To which do you want to see first? - M14 NBB - M4/M16/SR15/SR25/G3 NBB - SVD NBB I do have a working engine 70% ready, all I need is to tailor it to a specific platform ( piston stroke, gas timing, Transfer bar disconnect and etc) Of course, once one platform is set, others will follow later. Because I figure I am working in a very Niche market of users, production will probably limited to 50 pcs. Your input, no matter the size, is very important. Btw, without the trigger disconnect, this system has a very high ROF, close to 35+rps @ only 70psi and closer to 45+rps @110psi ( began to sheer bb's in a P90 platform because magazine would not load fast enough) Link to post Share on other sites
Beast06 Posted June 18, 2009 Report Share Posted June 18, 2009 SVD SVD SVD SVD SVD!!!!! Link to post Share on other sites
greg Posted June 18, 2009 Report Share Posted June 18, 2009 I would prefer a M14. But, Everyone else esp in the US will want an M16-a-like, so you had better do that one first. Get a commercial success under your belt then you can worry about fringe minorities. Greg. Link to post Share on other sites
Bodgeups Posted June 18, 2009 Report Share Posted June 18, 2009 Likewise, I would very much like to see an M14, but agree with greg's reasoning. Earn your name first, then branch out Link to post Share on other sites
Trasher Posted June 18, 2009 Report Share Posted June 18, 2009 The M4/M16 market is extremely oversaturated with hundreds of different rifles... Who would notice a NBB M16 under the avalanche of heavily marketed new GBB products. And people would b*tch about the lack of recoil and how XZY M16 is better. So i'd go for the M14, it's a popular, but underrepresented platform. It's available in short and long (fullsize and socom), different cheap clones and accessories are available, and more skirmishable than the SVD (had both). Link to post Share on other sites
Armyart19 Posted June 18, 2009 Report Share Posted June 18, 2009 I think the M14 would be the best starting. Like somebody said earlier. There are too many m16/m4 type out there. Make something unique. Your good at it! Link to post Share on other sites
Stuey Posted June 18, 2009 Report Share Posted June 18, 2009 So hang on, this is 'NBB' but can fire full-auto? Stu. Link to post Share on other sites
MagnumBB Posted June 18, 2009 Author Report Share Posted June 18, 2009 So hang on, this is 'NBB' but can fire full-auto? Stu. In all technicalities, the system is a blow forward system. The felt sensation of the forward traveling piston is negligible, so I am not going to call it a GBB. It is semi auto with a transfer bar that disconnects the flow of gas as the peak of the cycle, aka right after the bb is fired. Seems like the response is for the M14, I would prefer a M14. But, Everyone else esp in the US will want an M16-a-like, so you had better do that one first. Get a commercial success under your belt then you can worry about fringe minorities. Greg. But its the fringe that I care about the most! Btw, this is no longer the same system I had previously been working on. ( traditional NBB w/ stiff trigger pull) After sitting here looking at the Crimebuster system, MGC system, Escort system and Sheriff Highlander system, this is more of a simplification of the Highlander system with a solid mechanical disconnect to allow semi-auto fire. Thus this system could be used as a solid ROF performer with the disconnect removed form the system Please, bring more words along and I'll get back to work on this as soon as I can. Link to post Share on other sites
scar527 Posted June 18, 2009 Report Share Posted June 18, 2009 i can't decide between ar-15 and m-14. I would go with greg's reasoning as well, so ar-15. Scar Link to post Share on other sites
shibisueka Posted June 18, 2009 Report Share Posted June 18, 2009 M-14. Since yours would be a unique M-14 design, wouldn't you get more demand for it than with an already saturated Armalite market? Link to post Share on other sites
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