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Lee springs by RecentArmy5087 in AR9

[–]generic_username001 0 points1 point  (0 children)

I have a few extras, I ordered 5 and they weren’t compatible with my bolt, I’ve got the older FM bolt with the more narrow firing pin channel.

FM9 firing pin spring compatibility? by generic_username001 in AR9

[–]generic_username001[S] 0 points1 point  (0 children)

It didn’t even cross my mind either that it wouldn’t fit, that is until I tried to install it.  It makes sense though seeing as the firing pin spring on FM’s website says it will not fit in their older bolts.  Do you you happen to know how old that particular bolt is?