I just got this today from MFI.

https://mfiap.com/i-8938674-mfi-5-5-long-low-profile-scope-mount-with-slots-windows-to-see-serial-numbers-on-hk-mp5-sp5-k-series-hk94-ptr-9r-608-hk91-hk93-universal-price-includes-usps-priority-mail-insurance.html

I wanted to mount an Aimpoint on my HK while utilizing an ACR stock and adapter. After doing some research on HK SP5 mounting options, I found these guys. Price is fair at $115. Installation was fairly simple. I followed the directions and I was good to go. I recommend MFI if you are looking for a solid mount on your HK SP5.

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Who makes the ACR stock for MP5?

Just a fyi, when using the acr stock your iron sights will be useless. The Aimpoint that is pictured utilizes the Larue LT660 mount. Everything lines up perfectly. Only complaint is that the sight is a little high.

I picked up a A2 fixed stock so that I could use the irons for the time being.

Thanks

How do you like the ACR stock on their overall?  I was considering picking 1 up to my Zenith Z-5P SBR.

If you are OK with the sight being as high as it is in the picture and not being able to cowitness, it's great. Everything lines up perfectly.

I think I want to use the iron sights for the time being, so I picked up an A2 fixed stock.