Originally Posted by
jmoore
That's probably one of the scarcer dates for No.4 production.
As far a the B-Square rifle mounts go, I've never seen one that was worth having. The aluminum is barely heat treaed 6061 and just won't stay put. Have seen them fail on everything from Mausers to SVT-40s. The only mount of theirs that I've bought was for a 1911 and it was marginal to poor. The others have been from friends and customers of various gunsmiths. Plenty enough to opine that there's better gear out there. Brian Dick sells a good one from Fultons', IIRC.