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Original price was: $72.50.Current price is: $68.99.

Out of stock


ATTENTION, Steiner MPS users: MPS’s recoil lug underneath the sight may vary in width and be slightly wider than that of the ACRO.  Should this be the case, firmly push the MPS on the plate, or gently tap on the sight until the MPS fully seats.

OPF-M17, ACRO is compatible with MIL issued M17/M18.

Machined in 4140 steel and black oxide coated, OPF-M17, ACRO  is a new member of our OPF (Optics Platform, Forward Controls) line.  We again eschew aluminum for this application, and continue to use steel as other OPF plates, we prefer steel plates for steel screws.  4140 steel costs more and takes longer to machine, we use it extensively on other products.  We do not deem light weight to be of particular use in this application, but consider reliability and durability far more useful and important qualities.

OPF-M17, ACRO is a drop in adapter for superb Aimpoint ACRO sights.  The removal of the P320, M17/M18 sight plate cover isn’t as straight forward as the Glock MOS, please follow this link for step by step instructions:

We will stress the importance of holding the LCI (loaded chamber indicator) with your finger or a piece of tape while removing the plate from the slide, the LCI spring is very small and fragile, and easily damaged.

OPF-M17, ACRO is identical to the Tangodown SSM-01.  We don’t like rebranding, but do make exceptions when the products in question are outstanding, and we share the same values as the companies that make them.  We’ve known Tangodown and its folks for a long time, we carry Tangodown products, and are proud to be able to put our logo on the SSM-02, and make it OPF-M17, ACRO.

OPF-M17, ACRO is precision machined from 4140 steel, and QPQ coated.  Aimpoint ACRO P1/P2 requires the plates to adhere to Aimpoint ACRO TDP with tight tolerances, OPF-M17, ACRO has proven to be the best choice among professional users.

OPF-M17-ACRO is shipped with two M4 0.7mm x 6mm  (torque value: 20 to 25 in·lb), a T20  key, and a packet of VC-3.

Proudly designed and made in the USA.


NOTE: OPF-M17, ACRO is compatible with MIL issued M17/M18.

Confused by the myriad of P320 models and slides?  You’re not alone, never have we seen so many variations for a single model.  The compatibility list will continue to be updated as SIG releases yet more P320 models and slides.





P320 Spectre Comp

P320 RXP

P320 Max

P320 XCarry

P320 AXG (if the front of the optics cut is straight)


Civilian M17/M18




Romeo1 Pro Cut

DPP Pro Cut

Pro Cut

P320 AXG (if the front of the optics cut is curved)

When in doubt, be sure your slide has the groove as shown below:

As SIG continues to make changes that make sense only to SIG, but make parts made for previous models incompatible, do note that if the cut in front of the optics pocket is straight, it will not work with our plate.

WARNING: This product can expose you to chemicals including chromium and metallic nickel, which are known to the State of California to cause cancer. For more information, go to

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