Timney Triggers 2 Stage Trigger, Fits MP5/HK 91/93/94 SEF/Semi-Auto Trigger Packs and Corresponding Safety Selector Levers, Two-pound First Stage Two-Pound Second Stage, Not Adjustable, Black Finish MP5 Introducing the HK MP5 Timney Trigger. One of the most popular designed firearms in the world is worthy of The World's Finest Trigger. You asked" we listened and delivered a two-stage" semiauto" drop-in trigger that is easy to install. All trigger parts have been expertly designed and precision machined from premium materials to guarantee a lifetime of dependable service. The trigger housing is made from 6061 T6 aluminum and anodized black to create a weather and corrosion resistant trigger.