I have an original Colt SP-1 "CAR-15" for sale. I bought this rifle new in 1982, and it is unmolested in original configuration:
-- slabside receiver(s) and "A1" type rear sight
-- nylon-coated die cast aluminum sliding buttstock (2 position)
-- 16 in. "pencil" barrel with "A1" style flash suppressor
-- original fiberglass filled "glacier" hand guard with straight metal (non-delta) hand guard retainer
I have shot the rifle approximately 2000 rounds over the years, but it has had EXCELLENT care, and shows MINIMAL signs of use. I have a bunch of pictures I can send via PDF if a serious buyer sends me a PM with their email address.
The rifle comes with the following:
-- two 20-round Colt magazines that shipped with the rifle (one is pristine, one has gold underlying anodizing visible in areas)
-- original nylon "silent" sling
-- original cleaning rod
-- owner's manual (with tons of Colt lawyer warnings in orange ink!)
I am asking $1250, shipped to your FFL. Legality of posession of this firearm in your jurisdiction is your responsibility, as is any transfer fees on your end of the transaction.