Compatible with Holosun 407K/507K.But the two Recoil Stops are too tall,In order to fit Holosun 407K/507K in better. maybe need you with a diamond hand file to grind down the recoil stops to a low enough level.If you really care about this, please don't place an order. Thanks for your cooperation.
Easy to install. 100% MONEY-BACK warranty within 30 days of purchase. NO QUESTIONS ASKED.
The kit includes 1X holosun mount plate, 6X Screws and 2X Hex Key.