Optic Adapter Plate - Sig P365X/XL/XMacro to Trijicon RMR/Holosun "C" Series

(35 reviews) Write a Review


This plate is compatible with the Sig P365X, Sig P365XL and Sig P365 XMacro slides only.

This plate is not compatible with the CA-Compliant Sig P365 (Model: 365-BXR3P-CA) due to the LCI on that slide. If you need a plate for a CA-Compliant P365 slide with LCI, it can be found here.


Each plate will ship with one set of M3x.5x8mm screws to secure the plate to the slide. 

Plates will ship with the correct mounting hardware, as ordered, to either mount the Trijicon RMR/SRO/RMR HD/RCR or the Holosun 407C/507C/508T/507Comp.

This plate WILL NOT fit the Trijicon RMRcc, follow this link to purchase the P365 X/XL/XMacro Adapter Plate for the RMRcc: www.mapleleaffirearms.com/ap-p365-rmrcc

 It is solely the responsibly of the customer to ensure the correct fasteners are used and proper safe function of the firearm is maintained. If you have any questions, contact a competent gunsmith for help!


Our adapter plate is CNC machined from billet 7075 aluminum alloy (almost twice as strong as the more common and cheaper 6061 Aluminum) and Type 3 hardcoat anodized black. To minimize unnecessary weight, the plate has had as much material machined away as possible without sacrificing any structural integrity.

35 Reviews

  • 5
    Best in class

    Posted by Diego on May 10th 2024

    This is by far the best plate option for the p365, most of the ones I have tried are not one piece of metal, meaning most of them have been a 2 piece metal plate that is held by 2 screws and or dovetail. Overall has keep zero very well over competitors. And the Fit is so good that there is no play back-and-forth.

  • 5

    Posted by Sean on Mar 30th 2024

    100% perfect fit. Flares out at an angle that looks great. I could not be happier with the product and look forward to my next purchase from Maple Leaf

  • 5
    Does the job

    Posted by Rodrigo on Aug 20th 2022

    Got this to put a 507C on my P365 since they don't make a 507K with the Vulcan ACSS reticle. Works great and is still comfortable to carry. I just wish the mounting screws it came with were black instead of stainless so they would match the sight better.

  • 5
    Works on P322

    Posted by Jimbo on Jun 12th 2022

    Worked great in my P322!

  • 5
    Excellent Product

    Posted by Tony B on Apr 24th 2022

    Installing this on my P365X was very simple, and a great fit for my Holosun HE507C-GR X2. This is very well made, and I would highly recommend it.

  • 5
    Great Product!!

    Posted by Jon J. on Feb 17th 2022

    I very rarely write reviews but this thing is so nice that I had to. I mounted it on my 365X and the fit and finish is amazing. For anyone thinking a full size RMR on a compact gun won’t be comfortable for EDC appendix carry, I was pleasantly surprised to find that I don’t even notice it. The 365X with the Maple Leaf plate and full size RMR is a more comfortable appendix carry than my previous EDC, a M&P Shield with no dot. For reference, I am 5-10, 185 average build.

    I like that I can now carry the same dot on and off duty. A few partners have shot the gun over the past couple days and all are equally impressed with the quality of the Maple Leaf Adapter Plate. Great product at a great price.

    Thanks Maple Leaf!

  • 5
    Optic Adapter Plate

    Posted by Michael Carter on Aug 8th 2021

    Fantastic product and I sincerely hope they make these readily available again. Fit is tight and secure and the cleanest option out there for an RMR on the P365XL. Customer service was also amazing. I'm looking for reasons to spend more money with Maple Leaf Firearms.

  • 5
    Optic Adapter Plate

    Posted by Jim Thornton on Feb 8th 2021

    extremely well made. Fits so well it feels like part of the gun !

  • 5
    Excellent FIt

    Posted by Aaron on Jan 23rd 2021

    High quality, easy 2 min install, nothing left to be desired. Thanks for the solution.