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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/11/2005 5:12:06 PM EDT
I have a old Prebann "Blue" label HB Upper ...Can someone tell me if it is a small pin or large pin?
Will it fit a new Rock River Lower?
Link Posted: 8/11/2005 5:18:25 PM EDT
Link Posted: 8/12/2005 1:30:32 PM EDT

Originally Posted By TREETOP:
The pin size refers to the front hole in relation to the back hole- if they're the same size it's small pin, if the front is larger it's large pin.



Except the back hole is not round. It's somewhat oblong, to allow for little dimentional variations in the lower. Better to stick a 1/4 inch diameter drill bit into the front hole. If it just fits, or snags a bit on the hole, it's a small hole. If it drops right thru, it's a big hole.
Link Posted: 8/12/2005 6:22:08 PM EDT
Thanks...It measures .249" and a 1/4" bit Almost goes thru... It is a small Pin...
Thanks Charlie
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