This video details the process of installing an AR lower receiver, specifically the Lee Sporting LS5, onto a PTR9CT MP5 clone. It highlights the installation of a Geissele SDG3 trigger and Radian safety selector, along with addressing a common issue where the Geissele hammer may require polishing by a gunsmith to ensure proper bolt cycling. The presenter expresses satisfaction with the upgrade, noting the improved trigger pull weight and overall feel.
This guide details the modification of an HK SP5K to incorporate AR-style controls using the Lee Sporting LS5 trigger group. It covers the installation of a B&T scope mount, Trijicon SRO optic, HK vertical grip, and SilencerCo Omega 9K suppressor. The modification aims to enhance the SP5K's ergonomics and functionality, transforming it into a modern Pistol Caliber Carbine (PCC).
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