"this is the best for the price, got the rs1 stock with the gold, and it was amazing right out of the box. the performance is good for the price, although I'd recommend a new hop up (MAXX ME Pro). the rate of fire is decent, but not blazing. the electric blowback is the coolest feature though. the bump in the bolt is there to open the dust cover, so don't think you got a bad gun when you get that on yours. the silver edge gearbox is super strong, and one of the most efficient gearboxes out there. it comes pre-shimmed, and with ball-bearing spacers on the gears. the quick change spring system is also great for changing the spring easy, and also taking the gearbox apart, since you can just take it out beforehand instead of having to hold the spring down with a screwdriver. the bot-catch that came on mine didn't catch very well, I haven't figured out how to fix that, but when I do, ill put it in the comments section. the rs1 stock is cool, but there is no room, and you have to take it off to put the battery in, so get a new one, I only got it because it was a lot cheaper.
I've done some modifications to my model, including: MAXX Me Pro hop up, lightened aluminum piston with double o-ring ball-bearing piston head, double o-ring aluminum cylinder head, double o-ring aluminum nozzle, 16:1 ratio high speed gears, m125 spring, adjustable performance trigger, prometheus tightbore 318mm inner barrel, and a teinley infinity 50k motor.
let me just say, craziest thing out there. the gearbox is sturdy enough to last all that, but let me tell you, that if you're going to upgrade your ebb silver edge gearbox, you should get a stronger spring to hold the mock bolt, because without modifications, mine broke after the first game. (recommended battery: matrix 11.1v 2500mah 35c stick-type)
one thing to add, get a sling, this thing is like 13 pounds, and the 45o irons are useless, I took them off, and immediately put on a 1x30 red dot sight.
"As per normal with APS, it looks good and performs okay. Since this is normal with this company, I gave it 5 stars. If this were a G&P product, it would absolutely not get 5 stars. It's really heavy (basically everything is metal except for the pistol grip). I don't know if I got a sort of lemon, but there was a bump on the bolt. It doesn't hinder the performance at all, just the looks.
It comes with:
The gun (DUH)
Rail segments (no hex key to secure it though which is annoying)
An APS high cap EPM
A good angled grip
Overall, it is a reliable gun for the price. If you are looking for a blazing rate of fire, this is absolutely not for you.