I have to agree with 00redZX-6R when he said "do not expect a drop in fit.I had to a adjust my rail for the bolt to travel smoothly onto the trunion. also my rails were rough on the edge so I had to use a small file some. the build presents some new chalanges to overcome . not more difficult just differant.
now I am rembering fileing the mag well to fit too and needing longer rivets to get a look I wanted.