To be fair, there are indeed drawbacks. Gas consumption is greatly increased due to the weight of the slide. Even during regular temperature, you can fire the gun fast enough to run out of gas before you run out of BBs, even on a full fill. A lot of upgrades, even though they're technically compatible, don't work in the WE hicapa. Highflow valves cause the aforementioned problem to become even more prevalent, same with upgraded hammer springs. Upgraded recoil springs will cause a number of problems with feeding and gas consumption and the slide not locking back.
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