Help id this firing pin m16 ar-18?????

[Johnny in Texas]

I found the large head firing pin in a box of parts from an EX-GI shooter years ago and it fits an M16 and works great. I had an AR-180 once and it seems like the firing pin was like this one. But can't really remember. Anyone know for sure.

Thanks,

[epa223]

Can you include a pic?

[Litt'le Lee]

M-16--AR-15--same -same

[Johnny in Texas]

Pics added. I thought I added it before but did not check my post.

[greenradiodude]

Early M16 firing pin....was changed to small head because of concerns with slam fires. Small head has less inertia.

Best,
Brian

[Johnny in Texas]

I just remembered the guy I got this from was involved in test AR-15's and AR-18's for the Air Force in the early 60's. He told me the AR-18's were problematic and parts broke during the test. He also said the the people that wanted the AR-15 fixed the demonstration to the Top Brass. He said they had 2 troops with M-2 carbines try to shoot down a cinder block wall and then the same 2 troops used 2 AR-15's to blast a door through another cinder block wall and run through it. He said they cut the door out with full auto fire and kicked it over and went through.

[epa223]

I'm not sure what the AR18/180 had for a firing pin but what you seem to have are a large and small head for the AR-15/M16.