I think charging handle on the m4 and HK416 guns are in a very aesthetic position. If you want to have a modified weapon, I think charging handle is one of the most important parts. In addition, charging handle can make you look like richer from outside. (its my personal opinion: D ) It's nice that the product is symmetrical. However, the gun safety hook is always on the left. So even though the symmetrical crown is visible on the right and left, you can only install your weapon on the left. Therefore, if you are using the gun with your left arm, the problems with the stock arm are also valid on this arm.