I've put together a few kits all with real HK parts other than PTR or SW receivers. I decided to take it to the next level. Still using HK parts but rolling my own, LSC/PTR flat. I might be doing a couple one at a time though. I should have taken pictures of rolling it. If you've never done one its more work than you tube videos make it look like or I'm just anal. I'm still massaging it into spec. This is 100% a hobby for me, I'm in no hurry. I have plenty of shooters already. Slow and easy makes for a better build Before anyone asks, I have a pistol end cap for it. It can also be a host gun for my sear