I will write a more detailed review after I have the space to do more accuracy testing.
I got this within a week of ordering and have found it to be a good gun. It has developed some RIS wobble due to the spring inside the delta ring slackening with repeated use (A $15 part btw) and the fact that there's nothing really securing the rails to the body. This problem can be easily fixed with a scope riser mounted between the front rails and the rail on top of the body, or Madbull's RAS fix if style is your primary concern. Don't let this dissuade you from buying, however, it's an easy fix and the gun is solid as a rock after securing the body to the RIS.
The rear flip up sight works well, there's plenty of room on this gun to mount whatever, and the stock fits a large battery, which is definitely a good thing. The fire selector gives you a satisfying click when you switch it. A good portion of this gun is metal, including the Delta Ring, RIS, Front and Rear Sights, Sling Mounts, the entire barrel, the high cap magazine it comes with, and the buttplate.. Mine also came with what I can only assume is a sling mount on the front of the stock about where the back of the thumb is, it looks like a giant metal grommet and goes through the stock completely. All the metal gives it a very good weight and the location of the battery combined with the location of most of the metal creates a very good balance.
The website informed me that the likely fps would be 350, and I was ok with that. I got it in the mail and Airsoft GI told me that their tests said it shot at 369, which I was really fine with. I took it to the field yesterday, got it chrono'd, and discovered it was shooting 393 fps. I was a little shocked by that but still quite fine with it. The bbs were coming out so quickly I actually thought it was jamming because I had a hard time seeing them in flight at one point during the game. I'd guess the rate of fire is about 10 rps but like I said, that's a guess.
Quick word of warning on how to easily avoid an irritating mistake and resulting repair process:
Do not close the bolt cover prior to allowing the charging handle to return to it's normal position. This will make it impossible to return the charging handle to it's normal position and open the bolt with the charging handle. To repair it you have to actually take the bolt cover off, close it, and then replace it while putting tension on the spring (by twisting) so it will open the cover properly. It's a pain in the ass and an easy mistake to make, so just don't do it. Also do not hold the bolt cover shut while pulling the charging handle, it will break the bolt cover.
Very nice weight and feels very solid.
Flip up rear sight is great.
Full stock fits large batteries.
High powered, mine recently chrono'd at 393 fps, completely stock.
Plastic flash hider is easily removed for barrel extensions, or metal flash hiders.
Comes with four rail covers.
Includes battery, charger, cleaning rod, high cap magazine
An abundance of metal parts, gives it a good weight
Battery location gives the gun a great balance.
Very cool stag logo
Hop up is VERY sensitive
High cap mine came with is really not good quality
The design creates wobble by not securing the rails to the receiver.
Several screws on my gun came very loose, and as a result the whole thing felt loose when first picked up. Had to tighten buttstock screws, barrel screws, and reseat the RIS within the Delta ring to fix.
Hop up is VERY sensitive.
Rating: [5 of 5 Stars!]