The H&K SL9 is based on the design of the famous G36. The SL9 is the civilian version of the rifle. The SL9 has a fixed stock which gives makes the gun more stable when firing. The stock is fully adjustable to different lengths and the cheek rest height is also adjustable. Since the design is based on the G36 this rifle is fully ambidextrous including the fire selector switch, mag release, and charging handle. This AEG features fully licensed H&K trademarks, adding to the authenticity of the gun. The gun is OEM by ARES, a manufacturer known for their high quality AEGs. At 450 FPS with 0.20g BBs, this rifle is an excellent choice as a DMR. The 650mm inner barrel runs all the way to the end of the attached mock suppressor. Combining the power of this rifle with the long inner barrel makes this gun extremely accurate and able to hit targets at a much greater distance than most other AEGs. The gun is made of nylon fiber with full metal internals. A fold-away bipod is included with the gun. The capacity of the included magazine is 35 rounds, but the gun is fully compatible with high capacity G36 magazines. This gun has blowback which adds a small amount of recoil when the gun is fired. Battery and charger sold separately.