Zaffiri Precision Adapter Plate for Post Style Trijicon RMR / SRO Footprint to fit Holosun 407k / 507k / EPS / EPS Carry. This adapter utlizes the RMR to RMSc footprints commonly found on optics like Holosun K series, Holosun EPS series, Shield RMS, Shield RMSc, and ZP SRC. We include screws for Holosun optics, other optics will require you to purchase your own 4-40 thread pitch screws. Lengths will vary based on optics. This plate is compatible with Zaffiri Precision G19 / G17 / G26 / G17Long / G34 Slides and Sig P320 – not compatible with G43 / G48 and Sig P365 slides. We cannot guarantee it will fit on all post style slides.