Heckler & Koch Parts Kits for Sale

Within Parts Kits, Heckler & Koch GmbH of Germany supplies factory-original, model-specific conversion and upgrade kits for its firearms, a program in place since the late 1990s and expanded in the 2010s with VP series slide assemblies. Engineered and documented by HK for armorer-level reliability and true drop-in fit on HK platforms, these kits include LEM trigger conversion options for the USP/HK45 family, ambidextrous control lever kits for USP variants, and long-slide assemblies for the VP series, rather than surplus or demilitarized build kits.