You can check with Bobro Engineering. I purchased a adapter plate for my 320 X-Compact from them because I wanted to install a Holosun 507C. The reason I went with a Bobro was that the adapter plate come's with a built in rear sight. There are other companies that also make adapter plates but I wanted to get a plate with a rear sight on it instead of having to order the plate then order a separate rear sight or a whole set of sights.