If your old Colt has the large pivot pin..?

[MrGee]

Hi guys ... thinking of upper swap on my top half AR- older SP1. when the question came up.. what size is your pivit pin.... can anyone tell/give me the measurements of both the large an small pin size ..
thanks,
Rich G,...

 

[hoghunting]

.315 and .250

 

[USMCG_HMX1]

Actually the new lower pins are 5/16 of an inch (0.3125") and the old SP-1 upper holes are 0.250 inches.


Cheaper Than Dirt has these for sale for about 10 bucks.





Kris