Heckler & Koch USP Safety Lever Kit Compact Ambidextrous Black. This item can be installed on either full-size or compact pistols. The USPC Ambi set has a slightly lower profile for those who prefer the lower profile lever. Easy to install no gunsmith needed. Specifications for Heckler & Koch USP Compact Ambidextrous Safety Lever Kit: Manufacturer: Heckler & Koch Color: Black Gun Make: Heckler & Koch Gun Model: Heckler & Koch USP Compact Hand: Ambidextrous Package Contents: Heckler & Koch USP Compact Ambidextrous Safety Lever Kit What firearm models does the manufacturer say Heckler & Koch USP Compact Ambidextrous Safety Lever Kit is compatible with? The manufacturer suggests that Heckler & Koch USP Compact Ambidextrous Safety Lever Kit is compatible with Heckler & Koch USP CompactHeckler & Koch 50219621: USP Safety Lever Kit Compact Ambidextrous Black