KNS has created a nice Charging Handle upgrade for the BRN-180™ line of upper receivers. Based on the classic AR-180 line of rifles, the BRN-180™ features a fixed reciprocating charging handle with an upswept angle. This can cause interference with some optics mounts making it difficult to charge the weapon.

The KNS BRN-180™ Charging Handle has a linear shape that prevents possible friction with your knuckles, but also neatly folds down nearly flush with the side of the upper receiver.