First of all, i did not buy the gun form airsoft gi so mine did not come with this extra mag, so i had to buy it. The first one that i bought leaked badly, so i returned it to the store and got another one, which also leaked. After returning the third mag, i got a new one, which also leak, but this time i gave up and kept it. It deos increase the fps and the kick back, which i like a lot. It is very hard to get the cartidges in and out, i had to get a huge flat-head screw driver to tighten it in properly. It deos stick out a lot which isnt very pleasing to the eye.
Higher Fps about 340
doent smell as bad when u fire, unlike the propane mag
I went through 3 leaky mags in a row
sticks out of the gun about an inch
cartridges are hard to get in/out
Rating: [2 of 5 Stars!]