Sig Sauer P320-M17, M18, X-5 Legion Pistol – Modular Red Dot Adapter M.R.A.

Sig Sauer P320-M17, M18, X-5 Legion Pistol – Modular Red Dot Adapter M.R.A.

Are you looking for an adapter to mount a multitude of Red Dot sights to your Sig P320-M17 pistol? Look no further… The OuterImpact Red Dot Adapter/Mount answers the question!

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Red Dot Adapter Mount for Sig Sauer P320-M17, M18, X-5 Legion Pistols – M.R.A – Modular Red Dot Adapter

OuterImpact is excited to introduce the Sig Sauer P320-M17, M18, X-5 Legion Pistols Red Dot Adapter Mount M.R.A. This product will allow the shooter to utilize a variety of red dot sights on their Sig Sauer with one adapter. We at OuterImpact have gone to great lengths to assure that the fit and finish of this system are top-notch.

We have been excited about the increased popularity of the Mini Red Dots on pistol platforms. Unfortunately, not all of us are ready or wanting to commit to a “custom-cut” slide. This does not appeal for various reasons. Some of which are: the price of modification, effects on the resale of the firearm, ability to “try” different Red Dots, etc.

The OuterImpact M.R.A. for the Sig Sauer P320-M17, M18, X-5 Legion Pistols answers all the above questions. We precision-machined the adapter plate from 7075 aircraft aluminum. Thus, the M.R.A. plate is extremely durable and lightweight. As you know, there are violent forces that take place when a gun is fired. We know that shooters do not want to “worry” about losing zero, because of an inferior mount. This is why we utilize weaver T-10 Torx screws and steel alignment pins to keep everything aligned and in place.

Thank you for your interest in our products. Check out our FAQ for answers to common questions and feel free to contact us at


Compatible Sig Pistols:

Compatible Red Dot Sights (Mounting Screws INCLUDED):

Mounting Hardware:

  • (2) 4-48 Socket Head Cap Screws
  • (2) Sight alignment pins
  • (2) M3 x 8mm Flat Head Screws
  • (2) M3 x 6mm Flat Head Screws
  • (2) M3 x 6mm Socket Head Cap Screws
  • (2) 6-40 Flat Head Screws – RMR
  • (2) M4 X 10mm Rounded Head Screws

Required Installation Tools:

  • Torque Driver
  • Extended shank 3/32 Allen Bit

Please follow mounting instructions included with the optic.

Material: Billet 7075-T6 aluminum.
Finish: Black Anodize
Coating: Anodize
Dimensions: Length: 2.0″ Width: 1.06″
Additional Tools: T-10 Torx driver (not included). Why is my tool NOT included? Click Here
Purchase Tool

US Patent: US D851,196 S

Burris FastFire II/III Install Video
Trijicon RMR Install Video

P320-M17 Adapter to Plate Installation Instructions

How to Attach the Red Dot to the Adapter Plate

P320- M17 MRA Installation Instruction Video

Additional information

Weight 2 oz
Dimensions 8 × 4 × 0.281 in


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