Stealthbomber Posted October 3, 2009 Report Share Posted October 3, 2009 You can still mill the back of the carrier regardless of eccentricity. Or you can still chuck up the end part which should be cocentric. This would be easy if the gas key can come off. Not vey well. The wall on one side is wayyy thinner than the other side. If you try and bore it concentrically you'll only be able to remove 1mm or so of metal. If you do it properly you can probably remove at least two or three times as much. Course, there's no reason why you couldn't mount the BCG in a 3 jaw chuck with a shim on one side to offset it suitably. I can see myself buying one of these for my AGM gun at some point. When that happens I'll probably drill a bunch of big holes through the left side of the BCG at the very least. Quote Link to post Share on other sites
snorkelman Posted October 5, 2009 Report Share Posted October 5, 2009 one thing that might be worth a try is increasing the length of the valve lock cut out to increase dwell time of the valve lock as a rough guesstimate Im thinking of trying to duplicate cubic capacity of the WA which puts us at somewhere in region of 23.3mm length for the cut out (up from original 17mm) Ino's 15.8mm bore x 17mm stroke sees 3.33cc of capacity fed by gas from the mag before the valve shuts off whereas WA's 18.5mm bore x 17mm stroke sees 4.57cc sooo.. 15.8mm Ino bore with increased 23.3mm stroke = 4.57cc Quote Link to post Share on other sites
Luis21 Posted October 5, 2009 Author Report Share Posted October 5, 2009 one thing that might be worth a try is increasing the length of the valve lock cut out to increase dwell time of the valve lock as a rough guesstimate Im thinking of trying to duplicate cubic capacity of the WA which puts us at somewhere in region of 23.3mm length for the cut out (up from original 17mm) Ino's 15.8mm bore x 17mm stroke sees 3.33cc of capacity fed by gas from the mag before the valve shuts off whereas WA's 18.5mm bore x 17mm stroke sees 4.57cc sooo.. 15.8mm Ino bore with increased 23.3mm stroke = 4.57cc Wow dude, that's impressive. Caught me sleeping, I didn't think of that. I really appreciate that you pointed that out. I'll see what can be done. I'll keep everyone informed. Thanks, -Luis Quote Link to post Share on other sites
somegirls Posted October 5, 2009 Report Share Posted October 5, 2009 Well, I don't have a WA but I watched your video anyway, so nice work! Quote Link to post Share on other sites
Luis21 Posted October 5, 2009 Author Report Share Posted October 5, 2009 Well, I don't have a WA but I watched your video anyway, so nice work! Thanks man, I appreciate it. I'll be getting my bolt carrier lightened. I'll post up soon. -Luis Quote Link to post Share on other sites
Schaap Posted October 12, 2009 Report Share Posted October 12, 2009 (edited) Great review Luis! I definitely need one of these to put in my WOC (that still has to arrive ) It will probably say "hello" to my CNC mill though... Edited October 12, 2009 by Schaap Quote Link to post Share on other sites
ranger-arg Posted October 12, 2009 Report Share Posted October 12, 2009 awesome awesome! now... i will buy one for my GBBR Quote Link to post Share on other sites
Luis21 Posted October 12, 2009 Author Report Share Posted October 12, 2009 Great review Luis! I definitely need one of these to put in my WOC (that still has to arrive ) It will probably say "hello" to my CNC mill though... Thanks. Definitely take it to the CNC mill. awesome awesome! now... i will buy one for my GBBR Make sure to use your stock plastic buffer if you're using an AGM or a Western Arms. -Luis Quote Link to post Share on other sites
t_hum Posted October 13, 2009 Report Share Posted October 13, 2009 Luis' carrier chucked up in my 3-Jaw. Its true there isnt much material to remove from the bore here. Chucking eccentrically means you can make the rear hole an oval more or less. Requires a boring bar and a 4-Jaw. We probably won't go this route unless the rest of the milled cuts cant get us to the target weight (which I think they will). This thing weighs a ton. Made worse only by the fact that the blowback chamber is a tiny bore. Quote Link to post Share on other sites
Luis21 Posted October 14, 2009 Author Report Share Posted October 14, 2009 Luis' carrier chucked up in my 3-Jaw. Its true there isnt much material to remove from the bore here. Chucking eccentrically means you can make the rear hole an oval more or less. Requires a boring bar and a 4-Jaw. We probably won't go this route unless the rest of the milled cuts cant get us to the target weight (which I think they will). This thing weighs a ton. Made worse only by the fact that the blowback chamber is a tiny bore. Ah, there it is. Yes, the blowback chamber kills it. Small chamber, thicker walls, more weight..... Bad overall. -Luis Quote Link to post Share on other sites
sebin90 Posted October 14, 2009 Report Share Posted October 14, 2009 I'am going to test it on CO2 on fill pressure. Should be great Sebin Quote Link to post Share on other sites
Luis21 Posted October 15, 2009 Author Report Share Posted October 15, 2009 I'am going to test it on CO2 on fill pressure. Should be great Sebin Yup, the results should be interesting. -Luis Quote Link to post Share on other sites
sebin90 Posted October 27, 2009 Report Share Posted October 27, 2009 (edited) So finally I got my BCG. The finish is cool, and yes, its heavy. As i said, I have tested it with CO2. I installed stronger recoil spring, for better ROF and start shooting. Only a few shoots on video because it is impossible to full fill the magazine using a 12g cartridge. Bud you can do it with a paintball bottle. I also made my hammer spring more tough, so the magazine valve on CO2 is not any problem now. The only issue with CO2 are valves in magazines. They jams a lot. I am working on it WA M4 on CO2 Edited October 27, 2009 by sebin90 Quote Link to post Share on other sites
Bastel Posted October 27, 2009 Report Share Posted October 27, 2009 Was the standart M4 an G&P or WA? How much FPS makes it? Quote Link to post Share on other sites
mutikasha Posted October 27, 2009 Report Share Posted October 27, 2009 You put CO2 at 800 psi in there? The thing didn't blew on you? I'm quite surprised that the had enough strenght to depress the walve on the mag. If those weren't GHK's (if it was an AGM mag) that would be near impossible. What round count can you get from a 12 g cartridge? Quote Link to post Share on other sites
sebin90 Posted October 27, 2009 Report Share Posted October 27, 2009 All my GHK magazines takes CO2 with no problem. But i don't know how about reliability. Refilling magazine every 10 shoots, I can shoot 30-40 rounds each cartridge. Quote Link to post Share on other sites
mutikasha Posted October 27, 2009 Report Share Posted October 27, 2009 I would recommend you not to do that anymore . The thing that should be achieved in CO2 usage is that you could plug in the 12 gram cartridge in your mag like in the WE system. In that mag you would have some thingy for regulating the pressure of your CO2 (making it 200 psi instead of 800 psi) thous making it a bit more powerful than green, more stable, and less likely blow up your internals. Getting unregulated CO2 directly in your mag via madbull adapter is not good as you can fill it for a very little amount (bb per fill), and it will cause breakage to your internals eventually. Also filling regulated CO2 vial madbull regulated adapter is also a not good. Quote Link to post Share on other sites
sebin90 Posted October 28, 2009 Report Share Posted October 28, 2009 Was the standart M4 an G&P or WA? How much FPS makes it? It is an upgraded WA M4 - G&P metal body, steel sear, hammer, bolt catch, the rest of fire control is stock WA. G&P Hop up chamber. I don't have a chrono, but i tested it on another BCG (RA-Tech NPAS installed in stock plastic G&P nozzle, RAT Bolt carrier), it shotted about 400 fps on i think NPAS at 40%. I would recommend you not to do that anymore . The thing that should be achieved in CO2 usage is that you could plug in the 12 gram cartridge in your mag like in the WE system. In that mag you would have some thingy for regulating the pressure of your CO2 (making it 200 psi instead of 800 psi) thous making it a bit more powerful than green, more stable, and less likely blow up your internals. Getting unregulated CO2 directly in your mag via madbull adapter is not good as you can fill it for a very little amount (bb per fill), and it will cause breakage to your internals eventually. Also filling regulated CO2 vial madbull regulated adapter is also a not good. I already shotted about 1000 rounds on my RAT BCG (with plastic nozzle!), so it is quite reliable - the BCG works as worked before. No visible usage after that. I agree with you, reducing pressure to 200-300 psi would be great, but i have no idea how to make it. Also plugging 12g cartridge would be great. But I don't agree, that you can't shoot many rounds using Madbull adapter. Just use it with paintball bottle, 30 rounds without refilling are no problem then. Quote Link to post Share on other sites
Luis21 Posted October 29, 2009 Author Report Share Posted October 29, 2009 Sebin I'm loving your setup dude! The recoil and cycling looks amazing. Be aware that propane is about 150ish PSI. You got your co2 at about 800 PSI. That's alot of juice. I'm really contemplating getting an adjustable Madbull CO2 charger hooked up to a paintball CO2 bottle. I'll run that setup if I can get all my mags to stop leaking gas 100%. Do your stock GHK mags leak at all? A little? Once again, great video. It looks great! -Luis Quote Link to post Share on other sites
sebin90 Posted October 29, 2009 Report Share Posted October 29, 2009 All my ghk magazines didn't leak at all. Ow, one leaked, but that was unscrewed gas tube If my new, stronger springs in magazine valves will solve the problem of jaming, that would be great! I'm really contemplating getting an adjustable Madbull CO2 charger hooked up to a paintball CO2 bottle. I have to say, that you can't fill magazine with liquid CO2 with this adjustable valve. It have to be liquid if you want to shoot more rounds than 2 or 3 Sebin PS Magpul PTS Stock coming Quote Link to post Share on other sites
Luis21 Posted October 30, 2009 Author Report Share Posted October 30, 2009 All my ghk magazines didn't leak at all. Ow, one leaked, but that was unscrewed gas tube If my new, stronger springs in magazine valves will solve the problem of jaming, that would be great! I have to say, that you can't fill magazine with liquid CO2 with this adjustable valve. It have to be liquid if you want to shoot more rounds than 2 or 3 Sebin PS Magpul PTS Stock coming Well, I just bought a Madbull CO2 charger. I'll see if I can fill my 5KU mags with a CO2 paintball tank. -Luis Quote Link to post Share on other sites
sebin90 Posted October 30, 2009 Report Share Posted October 30, 2009 I have to say it can be very dangerous. It could explode. Be careful! Quote Link to post Share on other sites
Luis21 Posted October 30, 2009 Author Report Share Posted October 30, 2009 I have to say it can be very dangerous. It could explode. Be careful! Yes, I know. Especially since the magazine is kept together only by pins.... You said that your GHK mags did not leak at 800 PSI, right? If so then I might look into getting some GHKs. Thanks, -Luis Quote Link to post Share on other sites
sebin90 Posted October 30, 2009 Report Share Posted October 30, 2009 Yes, they don't leak, but at this pressure valves jams, after some time of holding gas. Sebin Quote Link to post Share on other sites
Luis21 Posted October 31, 2009 Author Report Share Posted October 31, 2009 Yes, they don't leak, but at this pressure valves jams, after some time of holding gas. Sebin You mean that the hammer can't depress the magazine valve to release gas? -Luis Quote Link to post Share on other sites
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