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Originally Posted by Rawbbeh
KenTsui - Thanks for the quick response! Very helpful.
Yeah I had a feeling the screws were metric when I wasn't getting much if any grip and the next size up was too big. As far as wiring the magazine to the battery...I might do that some time down the road..but as of now it works fine so I don't necessarily see much of a reason to do it right now eh?
Since I haven't been in the gearbox nor do I plan on it until something breaks...how would you gauge the quality of the gearbox shell and internals? Pretty beefy or did they go for cheap on it and cut corners? Seems pretty solid from what pictures you have taken. I am not unfamiliar with gearboxes at all so when the time comes to do repairs or maintenance it shouldn't be much of a hassle for me I don't think.
Lastly...as this one took me by surprise. Evike.com's website shows that this gun shoots about 350 FPS...mine chrono'ed at 420. Any idea why there would be such a discrepancy? Did Evike not chrono their test gun and just take what the manufacturer said it was shooting at? I am curious now to want to open up the gearbox and see how good the compression is on my particular MG42...maybe it was better than yours (you said you had poor compression on the piston)
I also have that HUUUGE annoying orange flash hider at the end of mine. I plan on just getting some Automotive engine primer and laying down a few coats inside and out with it, taping off areas I don't want painted and making sure when i paint the inside of it that it doesn't get paint in the inner barrel (prolly stuff a cotton ball in there or something). After the Black Primer I'll lay down a few coats of matte varnish to give it a shell of protection so it doesn't chip or scrape off as it comes into contact with the environment during play.
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It's definitely not necessary to wire the drum to the gun battery, I just did it for sake of convenience. I always forget to charge my AA's. Plus, I needed the extra voltage to keep up with the rof.
The gearbox feels pretty beefy to me. I'm not an expert when it comes to MG's, since this is my first one, but I don't really see any weak spots in terms of strength. It's definitely more reinforced than your standard V2. The weight of the gearboxes gives me the impression that it's not overly cheap. The lower GB is pretty spot on with axle spacing and construction; although, I'm not thrilled about the way it mounts to the motor. The upper on the other hand, seems to lack precision: Tappet channel is not straight, spring guide hole is too small, cylinder window short (not sure if this was purposely done), cylinder head posts with relationship to the cylinder window doesn't seem quite right (showing some of the o-ring on the CH). They mate together pretty well though, I'm glad about that.
I'm not sure what it chrono'ed at but I gave Evike special instructions to install an MS120 spring to make it over 366. I haven't tested it after the nozzle upgrade but I think it was actually shooting around 1.25J with the spring they gave me. There was a spare spring, presumably stock spring, inside the box, but no sign of the empty Prometheus spring box... For all we know, maybe the stock spring was already M120. I used their customization service and specified the spring (saved $5). It pisses me off that they have to charge me 1 hour of customization work to swap a QD spring!
Edit: I just remember you are from Texas. In case you didn't know, it is required that the airsoft gun shoot over 366 fps with .20 in order for it to import into Canada.
I did exactly what you described with the flash hider, but I advise you to sand the tip before priming, as it took several attempts to actually apply the Krylon primer that I used. For some reason, it didn't seem to want to stick (I got lazy and skipped the sanding). I also did a pretty crappy job of masking and ended up getting some over-spray over the hand guard. Once the matte black paint dried, you could clearly see how the factory paint is actually a bit glossy.