SPaulS

I too run one of my 4 position kit with a RDIAS like hkg3k. I would say both DPMS or Colt selector with a RDIAS is good to go. For me out of all the parts between the two kits the Colt sear is the unicorn. Unlike the DPMS sear, which is just a cut down sear, the Colt has its hook. The problem is there is no easy way to reproduce one short of stamping new sheet metal. I have never had one but it looks thin to weld and tough to match the original shape. I don't think a standard sear could be cut to match because the colt selector doesn't use quadrants in line to the markings, with the hook end going past 90 degrees of the selector. see the pictures if that makes sense. With a Colt selector, unless you have a RDIAS or a Colt sear I am not sure how to make it work. Something needs to limit the rotation of the sear so it moves enough to catch the hammer but not do a full spin. So I don't think just cutting the leg of a sear would work. Like hkg3k said hammering out and welding a tail on the burst disconnector is simple enough. Just make sure the two disconnectors don't rub each other and that the disconnectors don't catch the hammer when they shouldn't. Eventually I'll have a few 4 position kits for sale. They will be DPMS pattern custom ambi selectors, welded burst disconnector tails and the rest from 3rd burst kits. But even with disconnectors the Colt selector will be hard to get working without a colt sear so I couldn't help with that.

I too would love to get my hands on a colt 4 way sear, with the big hook. Don't understand the design, can only speculate colt was required? to keep semi in the 12 o'clock position. DPMS 4 way pattern makes more sence if you ask me. First flip is auto or burst and then semi, just don't forget to hold down the sniper button on the right side for those semi sniper shots . I am working on some dpms style 4 way kits. Milled ambi selector with screw on pointer caps sized to fit over the receiver stops. Eventually be 3 round kits with welded and modified parts. Anyways J.Mcf, what kind of build are you doing? Colt original looking setup with engraved FCG markings or slapping parts into what you have? As for the colt 4 way sear being rare and hard to find. In a pinch I wonder if a standard sear could be slightly modified or cut to work. Maybe enough so that the sear will always catch the hammer but enough tail left so it won't do a backwards 180. Would be just like a RDIAS setup.