(Disclamer I bought this knowing full well the current batch of these m9 had bad gas efficiency and tested 2 double bell magazines)

Well worth the price! After testing i found the this gun and it's stock magazine is extremely poor in cold weather. However After purging air from the mag and shooting on a warmer day it will easily mag dump 15 rounds. Not the max for the mag but it's only 12°C here and sunny so I would imagine on a really hot day the gun would function as it should. FYI I tested using propane. The look and feel is way higher than you would expect for such a low price. Fairly accurate up to about 20 yards. May buy another. 1 for each hand lol.