Old Colt SP1 and Full Auto FCG???

[diginit]

Has anyone testfired this? Like... lashed it to a tire and pulled the trigger with a looong string? It looks to me like if you put a FA or shouded carrier in that, It would be slamfire city...IMO Someone has substituted some parts attempting to make an M-16 and changed the carrier when they took it out to shoot, Then changed it back for storage. Are there any wear marks on the firing pin where it could have caught the hammer? Looks like it in the pic. If the cotter pin in the carrier is bent, There's the proof.
Without the disconnector hookup or a FA sear when in #3. Your pin will catch on the hammer with that carrier. Change the FCG. NOT the carrier. With a shrouded carrier, This will go FA and could easily fire out of battery due to no timing control. If a round is slow to chamber. The hammer would hit the pin weather or not the rnd is chambered and the bolt locked. Then you can remove the bolt carrier from your ear.

[FLIGHT762]

I've read that in the early SP1's, all you had to do was to place a hairpin (Bobby Pin) under the front of the disconnector and the rifle could slam fire. No parts had to be changed out. That's why later SP1's had the carrier modified with a cut out in the firing pin area of the carrier and the hammer had a notch cut out in the front of it.

With the hard primers in the military ammo, the rifle may fire or not. Using softer primers, the rifle will auto fire.
Doing this would be very risky as the gun slam fires(carrier rides the hammer), there could be a possibility of an out of battery kaboom.

[VaderSpade]

I bought my first SP1 brand new in 1983 serial #115XXX it came with a semi auto LPK and bolt.
A year or so later I bought an older used SP1 serial #70XXX. It did have a FA LPK, but no sear or hole. I assumed the former owner (who was deceased) swapped out the parts, and I quickly switch them to semi auto parts.
This thread has me wondering if it did in fact come that way???