"Alright, that's a good question actually, and I hate supporting review-board questions but this one I think should be visible to anyone with a G36 looking to get this drum mag now or in the future. I have a JG G36c and a Classic Army CA36E(the longest one) and have tried several times to get the C's stock to fit around this thing, but it just won't go, however on the E's stock, 1" bigger it fits without a hitch. This is because on all G36c models, the stock is shortened by about 1" to help make it more spec-ops frienldy and compact. I believe the K, and for sure the E models have the longer stocks that will fit around, but I assure anyone who will try this as one who has already experimented with it, folding the stock on even a G36c with 3000rds under the gun will get VERY heavy on your wrist very quickly, so a K or E will be even heavier. However, if you get a good one(i got a lemon from the bunch), a G36E with an M203 on the bottom, scope on top, add this sucker and that's all the aggro and firepower you'll ever need on a field.
More specific to the drum, it's got a few internal flaws that could be looked at and some reinforcement that wouldn't hurt. The internal spring that keeps the BBs going towards the feeder and keeps them from rattling is, in my opinion, a little stronger than it needs to be. Also, the motor in mine isn't that great but works really good while it does; in just under 10 seconds I can go from full auto firing to out and back to fully wound again while firing. This will apply to all of the drums because the only difference between the models is a seperately attatched mold for different magazine designs held on by 2 screws, one on the front and back. Feeding isn't the easiest I usually just unscrew the top, pour in until it's full and can't hold any more, then attatch the top and top it off. Be careful to remember the pressure switch is either in or out of your mag before swapping once it's out(if you can fire that much) because it's a pretty mediocre cord. That should about cover most everything about this, oh, and it takes AAA batteries and is a power hog so I would suggest investing in a wall charger and a pack of rechargables. Hope this helped and happy huntin!
"I really like this, its about twice the price of a high cap, its also auto winding which is awesome, though it uses batteries. Just try not to get trigger happy with it, and shawn, don't give it a 2 because of your own problems learn to shoot less.