My Colt SP-1 question

AR/M4 AR Technical Discussion
1

I have a brand new semi auto Colt SP-1. I would guess it was produced in the late 1970’s. Question - were they produced with semi or full auto bolt carriers ? I have both types of new Colt bolt carriers in my safe.

2

This would lead me to believe definitely not the auto carrier, read this article:

http://weaponsman.com/?p=11263

3

My Colt SP-1 from the early 80’s came with a non-shrouded, semi-auto carrier.

4

My 1980 SP-1 had the same. Man, I miss that rifle.

5

Wrong thread.

6

Semi

For timeline, I bought 18xxx in 1974, and 129xxx in 11/80.

7

1975 SP1. Semi-auto, non-shrouded carrier.