See: MIP

MIP have introduced the Pucks 17.5 Drive System for the TLR 22 5.0 and 4.0. Made from 7075-T6 hard anodized aluminum, the Pucks Drive System saves 40% of rotating mass compared to the standard differential to provide less motor fatigue and increase acceleration. The Pucks 17.5 Drive System is fully rebuildable and comes with Puck components, 2 piece outdrives for easy maintenance and repair and 1.5 Pucks for increased life.