Ambi Sling Mount mount seats into the front of your KRG chassis and provides a non-rotational QD mounting point on either side of the forend and also one at the bottom position. You can also use HK type hooks with this mount. Fits: All Whiskey-3 Chassis, all X-ray Chassis, Bravo Chassis, and TRG-22/42. Restrictions: Requires removal of steel insert plate on TRG's, can't use TRG bipod, cannot be used in conjunction with KRG Spigot Mount. Mfg: Kinetic Research Group