"I've been playing around with this gun for a couple hours, and I'm reasonably satisfied. I'm not really a fan of the iron sights, but they work well enough if I aim slightly to the left of my target.
Magazine compatible with M4 rifle
Easily hits 300 fps
Stupid little strap isn't nearly long enough, so I had to steal one from my duffel bag.
Magazine is clearly used already
bb's curve up over distance due to fixed hop-up
Can't add attachments. i don't have any to put on anyway, but if you like scopes, flashlights, etc. don't bother with this
final notes: I'm happy with the gun, and it'll be nice to have another primary to choose from. I shoot .25 bbs, which work for me. .12 bbs work ok, but curve up a lot past 15-20 feet. Overall, i'd say it's best for beginners/casual players, like me. "