Check this WE MK17/SCAR H Auto Sear Trip Lever Holder made with 3D Printing as shown by Nugentgl... "Great new product from GBBHungary Shapeways store! It is made of stronger material so it doesn't break after only a few magazines. My video shows that it cost $9.50 but it costs $13.00 now so it can be a drop in fit."