kasaran
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odd thought on cylinder compression etc. i have a secondhand CM16 shorty firing at 297fps. i assume the interior is the same as the longer barreled version.... so would that mean i may see a jump by putting in a longer barrel? else they would have different cylinders or fire with a lower fps than this one? (this is ignoring the airseal)
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It's possible, and plausible, and even likely, but I wouldn't want to leap to any conclusions.
If you're wanting to improve the air seal and energy, I'd start with just squirting some silicone oil or spray up the nozzle, swish it around, then blow it out the nozzle before re-assembling. You can also get some in behind the piston head via the cylinder cut out.
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The gearbox sounds alright so that is something im trying not to crack open. im trying for a more classic M4 look, so i have ordered a 4 inch outer barrel extension which will allow for a longer inner barrel. So if the theory is right that they use the same gearbox etc in all varients of combat machine, will give it just a little more fps without having to open the gearbox (another 20 to 30 fps would do nicely.) The current plan is a new hop-up assembly inc rubber and buckings with a longer inner barrel. open to recommendations on good hopup units not gone aftermarket for these before
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