Things I liked:This gun is pretty damn awesome. My friend has a chronograph and we checked it shoots around 350-365 fps with .12 gram BBs. It shot 320 with .20s but .20s carry more damage because theyre heavier. This gun shoots 10-11 rounds per second, and its pretty acurate if you use .20 gram BBs. I like how it is fully licensed so they can legally call it the HK G36C Things I would have changed:This gun has a plastic body so it is lightweight and metal internal parts so it dosnt break the first week you have it. I would change the FPS though because it is around 320 FPS with .20 gram BBs What others should know:This gun comes with 5000 free .12 gram blue BBs, but i bought a pack of .20s because it is more acurate a carrys more stopping power/damage. If you do use .12s make sure the hop up is set lower or else the BBs will shoot straight up. Also, make sure you do not over charge the battery because I used to have an M4 carbine and that is how it broke, so only charge it for about 2 and a half hours at the most.