I purchased a Blue Sky M1icon from a dealer at a gun show in K.C.M.O back in 1989. $350 in the box. It was an Anniston arsenal rebuild with the electro-pen markings of 3-66 on the receiver leg.
It was a total mixmaster. 5.4M SA receiver, but with a complete WWII trigger pack, uncut Op rod, Winchester bolt, Win.gas cylinder and Win.buttplate. The entire gun except for the bolt was redone in a light gray park. The bolt was parked black and appeared brand new. The barrels bore was a pitted up sewer pipe and shot minute of barn door at 100 meters.
While the metal work externally was in like new condition, the stock was complete crap. I had the barrel replaced in 1991 and a Boyds walnut stock replaced the beaver chewed birch stock set in 1994. After firing less than 200 rounds, it went in my safe where it remained until earlier this year. I have ordered a correct 65 series bolt and gas cylinder that will replace the Win. bolt and an unissued USGI birch stock set was just installed. I have another WWII era M1 that I use for blank-fire reenacting and I'm planning on using the 5.4M for range/competition shooting once it's 'restored' back to it's arsenal rebuild look of the 1960's.