Is there a Colt representative here on the forum. I ask because I would like to replace the low profile GI type sights on my original MK IV Series 70 from the early 80's with the later high profile sights. Looking on the Colt web site parts section I see the late type high front sight listed but not the rear sight to go along with it. I tried to buy the Colt sights from Brownell's but they were back ordered for over 6 months and I finally gave up. Seems both front and rear should be available together.