Interestingly, the trigger and hammer pins appear to pre-date 1967 and have the dimpled manufacturing artifact associated with the earliest SP1’s of 1964-1965 serial ranges. The correct butt stock has a rounded butt with no storage compartment, hinged swivels and a 13″ LOP. The butt stock is incorrect appearing to be an A2 butt stock in the modern configuration with trap door, fixed swivel and 13.5″. The lower receiver is also questionable as a C&R. Then the dust cover has the large square pad that was phased out early on in 1966. The A1 birdcage was not phased into Colt’s civilian AR15 production until at least two if not three years later. A correct 1967 SP1 would have a slick side parkerized bolt carrier and a parkerized bolt (the chromed bolt was phased out in the preceeding year.) A correct 1967 SP1 should have a pronged flash hider secured with the unique textured crush washer with a diagonal cut. Colt produced no chromed bolt carriers (with the exception of a run of 1,000 Colt Guard finished guns in the 203,xxx s/n range years later). The upper receiver has a transitional tear drop forward assist that did not appear in production until the mid to late 1980’s. The gun in the video appears to me to consist of an upper receiver assembly from a gun made in the late 1980’s and a lower made from mixed parts. This would be less of an issue let’s say with a restored older firearm than one made of interchangeable parts like the AR15. Does the date the receiver left the factory determine that a firearms is a C&R? For example, I do not believe the rifle shown in the video is in original condition. How original must a firearms be for C&R status? What degree of originality is required? BATFE’s FAQ’s on the subject suggests that the firearm needs to be in original condition.
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