Hello, and welcome to my review of the G&P Marine Stock!
Background: I was tired of the wobble and look of my crane stock and didn't want to go with a full stock. I placed my order on AirsoftGi on Monday, July 30th around 8:45 at night and it was processed the next day. The stock cost $105.00 and in my order I also purchased a $5.00 patch, with a discount coupon and free shipping I paid a total of $102.65. It arrived to my door Friday, August 3rd at 10:37 Am. I believe I got the last one because after I ordered mine, it went out of stock online here ->
http://www.airsoftgi.com/product_info.php?products_id=3364 Packaging: It came in box that was very large in comparison to the Stock. It was well packaged with packing paper on bottom and top although I have no worries about it breaking.
The stock came nicely packaged in a thick clear plastic with the separate parts individually packaged.
Everything that came included. The swivel mount was not mounted in the box.
First Reaction: When I first took it out of the package I was immediately impressed. The weight of it was much more than my crane stock. I put all the parts of the crane stock (the screw and sling mount thing are inside) on my scale and it's weight was 14.3 Ounces.
After I put all the pieces of the Marine Stock on the scale I was gratified by a very solid 1Lb and 11.3 Ounces.
Mounting: In order to use this stock the piece on the back of your receiver that your stock goes on can only be 25 millimeters. Depending on the gun you have (I had a G4 or GnG) and I had to cut about 1 inch off of the tube.
Now in order to get the stock apart you have to unscrew 4 hex screws that hold the two parts of the stock together, I have read some things about this and I have to agree with them that this is a pain in the butt. The screws screw into a nut thing that goes on the other side of the stock.
When I tried to attach the stock to my gun I encountered a problem. Due to the Skeleton style of the stock the way to attach it was very difficult to tighten the screw that goes into your gun. After I tightened it by hand (only could get two fingers on the screwdriver) the stock wobbled side to side a little. I solved this problem by using a pair of pliers to tighten the screw.
Battery Space: There is a lot of room in this stock for your favorite batteries. I got a 9.6 nunchuck in and still had room for an additional cell in length and in the picture the battery is sitting nicely in just one side and the middle of the stock so I believe you could get a tri-leg nunchuck in like this one
http://www.evike.com/product_info.php?products_id=24476. 
