THIS PLATE REQUIRES A ROMEO 1 PRO OPTIC READY CUT WITH RMR HOLES, REFER TO THE PICTURES ABOVE TO VERIFY YOUR SLIDE HAS THE CORRECT HOLES AND CUT. IF YOUR SLIDE DOES NOT HAVE RMR / HOLOSUN THREADED HOLES OR NEEDS TO BE UPGRADED TO THE ROMEO 1 PRO CUT, CLICK HERE **THIS PLATE IS INCOMPATIBLE WITH THE NEWER SIG-LOK CUT. CLICK HERE TO SEE PICTURE.** This filler plate does not require any additional screws. It is held in place with the RDS and it's mounting screws. The C&H Precision plates are designed, manufactured and shipped from our small family owned business in Coastal Georgia. Each plate is precision machined to the tightest tolerances on HAAS CNC machines and each plate goes through multiple quality checks before shipping to our customers. SPECIFICATION: Material: Plates are made from 6061 aluminum. All mounting hardware is Stainless Steel Finish: Plates are MIL-SPEC Type III Hard Anodized - Black INCLUDED: Qty 1 - Optic Plate Qty 3 - 6-40 x .3125 M3H Holosun 407C / 507C Optic Mounting Screws Qty 3 - 6-40 x .380 M3H Trijicon RMR / RMR HD / SRO Optic Mounting Screws Qty 3 - 6-40 x .460 M3H CHPWS COMP / EDC XL/ COMP MAX Optic Mounting Screws **Trijicon RCR** The RCR Optic comes with Trijicon screws that are "Patented". You must use the screws they provide you. C&H will not make new screws for this optic / plate combo. It is the responsibly of the consumer to check fitment of the provided screws for length. The screws may have to be slightly modified or shortened in order to ensure proper fitment. Agency / Department Discount Program DRY-FITTING DISCLAIMER: At C&H Precision, our products are designed and manufactured to meet tight tolerances. Installation can be affected by variations in your plate, hardware, optic, and firearm tolerances. For safe installation and to prevent potential damage to any component, we advise dry-fitting all parts before a full installation. If any problems arise during this process, please reach out to our Customer Service via our contact portal. IRON SIGHTS DISCLAIMER: When making aftermarket firearm modifications, factory components can often become obsolete, particularly when mounting optics on the slide, whether through direct milling or using a plate. Achieving the correct height for low co-witness iron sights depends on factors such as the firearm type, mounting plate, optic, and slide cut. For assistance in determining the appropriate iron sight height for your specific setup, please contact our Customer Service team through our dedicated contact portal.