First off: this gun is full metal. no joke at all. the only plastic is teh rail guards and the stock (good quality). I have only used this once but it was really good. i used the stock version, but i plan i getting this gun with a tightbore. Out of the box accuract is good, i would say a man sized target at 125 ft. This may be the best M16 RIS for under $250.
MAGS: like any other full sized rifle, only specific mags will work. Echo 1 mags, D-Boys, A&K, and other CHINA brands work fine. The mags are a little loose though. I am the sniper on my team so i have 2 300 round mags and 1 190 round mags.
INTERNALS: ASGI is right about the new A&K guns. The internals rock. This is a slightly reinforced gearbox, metal bushings, m1-- spring (not sure), metal spring guide, good gears, and more metal parts.
POWER: This gun is very powerful. I would easily say this gun clocks around 400 give or take 15 fps. I used a poormans chronograph, the BB went striaght throuhg both sides so that puts the gun at over 380 fps. Very powwerful gun.
ACCURACY: Stock, the accuracy is exceptional FOR A STOCK GUN. This is not the best accuract out there. At 135+ feet the bbs start to spread. Easily hit a mna sized target at 125 feet.
RECCOMENDED UPGRADES: metal bushings, m120 spring, and mabye stronger gears. I also recomend upagrading battery (8.4v 3600 mah is what im using). MOST IMPORTANT UPGRADE: get a 6.03 tightbore barrel for sure. The accuracy will get so much better. Using .23s and a tightbore you will be a true airsoft sniper.
OVERALL: this is an insanely wicked gun. Everytime my friends comes i pay hi 50 bucks to use it. I have used it 15 times now and im buying one in like 2 weeks. Buy this gun if you have the chanc. Leave it for fun backyard battles. Or upgrade this sucka for true sniper power.
PS: very high ROF. easily used as a support gun if you have an electric windign box mag.
Rating: [5 of 5 Stars!]