With the lack of milled parts kits in mind, we came up with a receiver to take your stamped parts kit to the next level. Our 80% receivers are made from 4140 steel then heat treated to 42HRC. Hungarian AMMS 63D parts kits are ideal for these receivers, but most all 1mm stamped 7.62 parts kits (except Chinese) will work as far as barrel population, bolt and carrier. The underfolding holes in the receiver are limited to Hungarian Underfolder or Milled Bulgarian Underfolder stocks. If building from a milled parts kit you will need to open up the gap between the ears on top of the front trunnion 0.085 of an inch for the rear sight block to fit.
Our receivers come with new heat treated cover plates for the hole in the back of the receiver and under the front trunnion. They also come with an 1/8" x 1/4" alloy dowel pin for the selector stop.
BE SURE TO ORDER THE AK-BUILDER "MILLED RECEIVER DRILLING FIXTURE" FOR THE CORRECT HOLE PLACEMENT.
These do NOT come with a bullet guide.