Battle Arms Development RACK AR15 Charging Handle Red. It is the toughest available for the AR-15 AR-10 and 9mm AR PCC platforms. The RACK charging handle is simplicity at its best with only three major components. Unlike other charging handles the RACK makes no contact with the sides of the receiver preventing wear on the receiver and charging handle. Not only is it fast buttery smooth it also minimizes wear to the upper receiver with it's side-sliding unlocking action. The RACK is no doubt the new heavyweight champion among all other ambidextrous charging handles. Engineered to withstand the abuse of downrange use Purpose built with asymmetric use in mind the RACK will handle left or right side pulls with ease. Regardless of your charging handle racking technique the RACK will perform with consistent and positive assurance. Specifications for Battle Arms Development RACK AR15/M4/M16/AR9 Charging Handle: Manufacturer: Battle Arms Development Caliber: 9mm Luger Gun Make: AR Platform Gun Model: AR-9 M16 M4 AR-15 Hand: Ambidextrous Package Contents: Battle Arms Development RACK AR15/M4/M16/AR9 Charging Handle What firearm models does the manufacturer say Battle Arms Development RACK AR15/M4/M16/AR9 Charging Handle is compatible with? The manufacturer suggests that Battle Arms Development RACK AR15/M4/M16/AR9 Charging Handle is compatible with AR-15 M4 M16 AR-9Battle Arms Development BAD-RACK-15-D-RED: RACK AR15 Charging Handle Red