The SIG 551 by ICS is a superb airsoft weapon. ICS has done a fantastic job on this rifle with great attention to detail. The body is made of full metal with the same trademarks as the real steel weapon. The fire selector switch is ambidextrous and clicks perfectly into place when switching between fire modes. The stock is very solid and can fold to the side for CQB situations. This is the full length rifle so it is also great for field play. The battery is housed in the front of the weapon. The handguard has two side rails as well as a bottom rail for adding accessories. Overall this is a very high quality AEG.