The Unorthodox Designs SLAP Loader for Sig Sauer® P320 9mm Magazines is the latest addition to the Slap Loader line featuring a durable polymer housing and a spring-loaded design for fast, user-friendly reloads with both high-capacity and standard-capacity metal P320 mags (NOT compatible with polymer P320 magazines). Designed to load one round of 9mm ammunition into your favorite P320 magazine at a time, this loader features a round-stripping notch on the side of the housing to unload your magazines one round at a time.