The following is an AS-01 that I got in a trade with the nice fluted barrel. The Barrel volume on it is not great for anything too heavy bbs. So I did some modding.. and some more modding and... maybe too much? Parts list X1 fluted outer barrel cut to length. X2 fine AEG shim (resolve play in Hopup arm) X6 thick aeg shims for trigger box sear and trigger) X1cut down 6.03mm barrel crowned X2 Allen screws with head ( for easy adjustment of the Hopup and trigger travel). X1 custom aluminum bar (hand filed bent, drilled and finished to shape). X1 m4 ergo rail section X1 domed Allen screw with locking but X1 maple leaf decepticon 70 degree bucking X1 generic scope and rings The metal bar is just scrap aluminum that I had lying around and a spare bit of optic rail. I cut the barrel down from the long version to just over what it would need to support a 300mm inner barrel. It has electrical tape shims on it x4. Maybe a bit much but the inner barrel is not going anywhere. I wanted to improve the Hopup so I found a longer screw with a head that should be adjustable with the scope on the gun. I also used Aeg shims to keep both sides of the arm centered. For the screw head to fit down in the rail I did have to do some dremeling. The nuts that the trigger box uses to keep the trigger and sear travel in alignment are very loose. I used tape to shim them. To see if it would be worth epoxying. I love the trigger sear simplicity if not it’s funtction... it’s a little clunky. I wish I had the right grinding set up and some chunks of tool steel. I would just make my own. I could do it with my vice and file set up but it would take a while. I suppose I could paint the bar black. But I was thinking of making this gun more winter worthy with a snow camouflage paint job. Not sure yet. What color should I paint it?