PERFECT FIT!!! Extremely satisfied with this product!

Great adapter! I picked one of these up at the Wanenmacher gun show and Chad was very helpful. Matches up to the rear of my receiver perfectly. I thought I might have to do some fitting but the plug fit the rear machining perfectly as well. It would be easiest to install with selector and fcg removed, but I was able to put it in without doing so.

If you have a mak 90 slant receiver this is the one you want perfect fit easy to install and strong and shoulders perfect plus add the US palms grip and your good to go for a shtf rifle

Left a slight gap (1/8-inch) between the straight part of the receiver and the adaptor, but locks up rock-solid and works great for updating my old MAK 90.