I'm trying to find replacement pins for an AR-180B lower that are longer than normal. I've considered have some made up but one of the fine folks who reads my blog suggested extended length pins like those used on a S & W 15-22 or a Colt 901. I also see that Mag Tactical lowers use longer than normal pins as well. I can't find lengths for these pins published anywhere so I am hoping someone here might own said guns and would be able to measure them.


I hope if we find something this post might help someone else down the road.


What I know


Standard length AR-15/M-16 .900"


AR180B length 1.125"

Colt 901 .995" (Thanks tomcatt51)

Mag Tactical ???