I bought this gun a couple months ago to replace an upgrade JG M4 with a plastic body that managed to get between me and the ground. It arrived fairly promptly from ASGI, and I pulled it out of the box. The first few shots were fine with the stock BBs. I threw in the tightbore, and took a couple more shots. When I went to my team practice, the rounds were dropping after about 30ft., and the BBs were shooting everywhere.
When the gun was disasembled, we found that the hop-up nub had fallen out, and that the gun is so powerful, that one of the stock BBs had shattered and gotten stuck inside the tightbore. So be warned, the stock BBs are crap! Use PrecisionAirsoft BBs.
As for the internals, I dropped an M110 spring in. I found that the stock spring definately wasn't above an M110, so I probably got a bad spring to begin with. As for the internals, it seems fairly well made, I like the RIS and metal body, but the fore-grip is pretty weak, and I ended up taking it off anyways. What I found was that the body pins are incredibly tight inside the gun (remember that there are small hex screws that keep them from popping out), and it took about an hour with a punch and a hammer to get the small gearbox pin out of the gun. It's still sticking out by about 1/4", I'm not even going to try to force it back in. Also, the paint job isn't the best, and it's very easy to scrape off some of the paint.
All in all, it's not a CA, but it's also $160 less than a CA. It's a good gun for the money. The external is solid, and buying a metal body and RIS upgrade would cost $300 without the internals. The internals aren't great, but they can be upgraded pretty easily.
I'd recommend this for either a medium player's first metal body gun, or for an experienced player who wants to do his own upgrades and modifications in a very solid external.
Good Quality Externals
Very tightly put together
Maybe a little too tightly put together
Not the best paint-job in the world
Foregrip is really flimsy (it's free though, so whatever)
Rating: [4 of 5 Stars!]