Below is an early SP1 5-round (still blocked) magazine with the original white dot stickers on both sides that I recently purchased along with some other early Colt 20-round magazines.  Does anyone know what years Colt marked the 5-round blocked magazines with the white dots?  For reference I have included two pictures of early SP1s that both have white dot sticker marked magazines.  They are #SP0323 and #SP118X respectively, both 1964s, and may even belong to members on here.













#SP0323


#SP118X

The one you have shown as SN 118 is not correct. It is a 4 digit. The SN is 1,18X. Made Nov. 16, 1964 and sent out of the Colt nest on Nov. 20, 1964.

There is something to this.   I cant remember bit its been a few years.  What kind of block is it?

It has the same sorta "U" shaped steel limiter that was also commonly found in later 5-round blocked 20-round body magazines that Colt sold and were also shipped with some later SP1 and Sporter model rifles.

Thank you and it has been corrected.

#323 is mine. Rifle was received with two mags. One regular 20rd., one blocked 20rd. Both had the white stickers. Neither one was a "circle 1" magazine. Not sure of manufacturing history.

I'll have to check the mags with 118x.. I honestly don't remember if one is block and one not.

I know I have one or two early mags with the white stickers. I know one if not both are blocked. I'll have to dig them out.