SIG P320 X-FIVE M17 M18 Romeo1Pro / DPP Cut to Holosun 509T



**This plate will not work with the Holosun HE509-RD ACSS Vulcan
(6 customer reviews)

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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.


Thickness:  V4 MIL / LEO Plates are .095″ to .099″ thick

Material: Plates are made from 6061 aluminum.  All mounting hardware is Stainless Steel

Finish:  Plates are MIL-SPEC Type III Hard Anodized – Black


Qty 1 – Optic Plate

Qty 2 – M4 Plate Mounting Screws

Additional information

Weight 0.25 lbs



6 reviews for SIG P320 X-FIVE M17 M18 Romeo1Pro / DPP Cut to Holosun 509T

  1. Edmund G (verified owner)

    Excellent product. Easy to install and instructional video was very helpful for install this high quality adapter installing the Holosun 509T on my Sig Sauer X-Five Legion. I will be purchasing another C&H Precision Weapons’s adapter plate to install another Holosun 509T on my Sig P320 Xcompact Pro.

  2. theboredkorean (verified owner)

    Plate fits but the screws are absolute junk. Knock off Loctite provided is also junk.

    Screws will walk out on you and you’ll have the most unreliable wobble.

    Reached out via phone, no one ever picks up during working hours.

    Contacted via customer service portal, no reply.

    Don’t purchase here.

  3. Mitchell Laclair (verified owner)

    The plate fits well, a little tight. Unfortunately, the wrong screws were sent. I contacted via email and the site contact form. I never heard back. Due to their lack of customer follow-up for issues, I would not recommend engaging this company.

  4. Bradley Martin (verified owner)

    I placed an order for this plate along with the 509t during the holidays. My order shipped with the wrong plate. I reached out to customer service and received a quick response stating that the correct plate would be shipped out that day. It arrived and is a great fit on my p320 x-compact. Installation was pretty simple. The only thing that might be nice is a video dedicated to the install of each plate on the gun it is designed for. Definitely not necessary, but could be nice. Fantastic product. Fantastic customer service. I will definitely be using their products in the future and recommending to others.

  5. Nathaniel Cress (verified owner)

    This worked perfect for my Sig X-Five Legion and Holuson 509T. Extremely well machined and perfect tolerances. The screw holes lined up exactly and the plate fits to a point of almost not even requiring them to stay in place.

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