Designed and manufacturered by Lone Wolf distributors this Mech housing lets you adjust pre-travel by the way of a set screw in the rear of the mech housing where it meets the crux of the trigger bar. This Mech housing is commpatible with OEm, Timberwolf and Poly80 frames. The LWD-UTH-9 fits 9mm pistols 17, 19, 26, 34 Gen3 and Gen4. MSRP of $19.95

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