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#9 |
RIP
Join Date: Jun 2002
Location: Southeast Texas Swamp
Posts: 2,460
Thanks: 2
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David,
I think that what you are refering to as "round" & "square", are the springs in the magazines. The original magazines were made of folded metal and had a round spring, when the extruded magazines were introduced they had an oval shaped spring that was stronger than the original round spring and fed more reliably.
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