This gun is overall a good gun. comes with a 6.04 mm semi-tight bore barrel and a length of 363 mm giving this gun a good amount of range and accuracy, not as much as an m16 but more comparable to an m4. when it comes to upgrading this gun, go very easily. Remember that this gun comes stock with a low power spring, and for a reason! the piston in this gun is just bad. it's clear plastic, not polycarbonate, and is custom to this gun. my experience with this gun will be remembered the rest of my life. this gun was the most stress causing airsoft gun I've had. To begin, the first day I got it The small lipo that I ordered couldn't fit in the battery compartment, so it got stuck and nearly exploded while I got it out, when I finally got a proper lipo (btw, this gun is deemed lipo ready, not by airsoft G.I but by Ares themselves and other sources) to fit into the compartment which it barely did, the piston broke within a matter of 500 rounds fired through it. This was a combination of the m-130 spring I put into it and the lipo. Like I said, upgrade this very easily, and if you do make sure you have the right gears and piston to withstand the upgrades. I finally decided to try to fix this gun after two years and had to file down the new piston I got for it because this guns gearbox is one of a kind (unfortunately). but now the gearbox won't click back together right. So I've given up on this gun, I'm holding off on it for a while. This is just my experience, but the gun itself is good not great, and I think it does deserve 4 stars. mainly contributed by it's performance when it works, it's appearance and externals which are all amazing.
-easy way to change spring without opening entire gearbox
-appearance, this thing looks amazing, the gray metal goes really well against the black polymer body
-external quality, the polymer on this gun is thick and hefty, everything is symmetrical and aligned
-6.04 mm semi-tight bore barrel for good range and accuracy
-great rate of fire with a lipo, 20-23 bps
-basically no wobble
-comes with an excellent mid-cap magazine
-m4 compatible (magazines, inner barrels, etc.)
-battery compartment is super small, but can still fit certain lipos and small types
-barrel and hop-up are locked inside of gearbox
-terrible piston, get yours changed if you can, mine broke within 500 rounds.
-I had a terrible experience with this gun, but that could have been avoided for the most part
-may not be "lipo ready" after all (I wouldn't suggest using lipo on this gun)
-the gearbox is custom, looks like a version 6 but it is not! alot of parts are not compatible with this gearbox without modification.
-price: I don't think this gun is worth $380 dollars, more like $300
-my trigger was a bit squeaky when firing