Quote:
Originally Posted by e-luder
I'm trying to build a fast cycling gun based on a 1911 single stack. I'm trying to get the slide to cycle more efficiently due to the smaller gas reservoir. Would it make sense to also pair the lighter NineBall BBH with some shock buffers to short stroke the gun and the stock recoil spring to achieve this goal?
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If you want faster cycling, increase the recoil spring to a stronger one as well. A stock spring is too weak - especially if you have a metal slide, it will move sluggishly. If your build is based on good components, you should be able to get over 40 shots off a regular 28 round MEU magazine.
Quote:
Originally Posted by e-luder
The slide is metal with a tighter than usual seal for the piston head. I customized the o-ring to achieve this. The loading muzzle is still able to spring back and fourth freely without friction.
I was wondering what your opinion is on this below:
I did the mod in the hunt to create a "perfect" seal to give a more crisp cycle- but as narrow-minded as I was, the perfect seal doesn't mean "no air leaks". the thing needs to vent...
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No, it does not need to vent during a normal cycle. It will vent when the slide blows past the release point. At this point, the gas vents out, and the seal is broken from the magazine. A tight seal is good, as long as it doesn't restrict movement of the nozzle drastically. Using a ventilated piston is the easiest way to get a tight seal without doing any sort of complicated modding of an o-ring.
Quote:
Originally Posted by e-luder
What worries me is that if piston head seals "too well", it may cause the loading nozzle to explode. I did the mod on the Glock Guarder nozzle for testing and though it boasted a higher FPS output (somewhere between 360 to 385 FPS), it cracked the muzzle. The gas pressure was too much for that particular muzzle. I am hoping that the TM 1911s have a higher tolerance than their Glock line. But I see no real design changes in their muzzle assembly.
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Your concern is valid, as it is common place to replace the nozzle with an enhanced one. The Marui nozzle is known to crack under moderate pressure. Using an enhanced recoil spring, metal slide, and propane is compounding the pressure on a nozzle that was designed to handle low pressure duster gas with a stock recoil spring and a light weight plastic slide. I can't even count the number of cracked nozzles I've seen.
I'm not surprised your Guarder nozzle cracked either... they're known to be fairly crap for the 1911/Hi-Capa platform. There are a lot of better options available.
Quote:
Originally Posted by e-luder
Is there anyway to get around this without reducing the size of the o-ring? Can I mod the floating valve to direct most of the gas to the BB while still keeping enough air to cycle the slide crisply? The only solution I can see it install stronger floating valve spring to keep the valve open longer. On the Glock, I also modified a Firefly floating valve to have "slimmed legs", a smaller valve head thingy to funnel air towards the BB more but it still destroyed the muzzle.
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I don't get what you're saying here. I think there may be some confusion on the understanding of how modern GBB's function (and all semi-automatic REAL guns, in general). You need to understand that the projectile being shot out of the gun, and the slide cycling are two DIFFERENT cycles of the gun... and they do not occur concurrently, even if it looks like that's what's happening. The cycle shift occurs so fast, that you may be perceiving them occurring at the same time, but that is not the case. In fact, the BB is fired out of the gun... and until it leaves the muzzle of the gun, the slide does not begin to cycle.
Once the projectile leaves the muzzle of the gun, a negative pressure occurs within the system on the barrel side, causing the floating valve to close under the pressure of the gas being exhausted in. Once the valve closes, the pressure is contained and builds in the nozzle. The only part that is able to move at that point, is the piston head, which is what starts the slide's blowback of the cycle.
Yes, I'm still selling ILLusion Kinetics Blowback units. I've received a resupply of a lot of inventory in the past couple of months, but have not had the time nor opportunity to list all these goodies yet. I've had to rebuild my sales page, and there is a ton of inventory here. It's taking me a while to get through.