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Old January 9, 2021, 09:49 AM   #36
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Join Date: October 28, 2006
Location: South Central Michigan...near
Posts: 6,369
Originally Posted by zeke View Post
Have owned several M1 carbines, but am not a historian by any means. My understanding is the M1 was designed for the 15 rd mags, while the M2 was designed to also use the 30 rounders. To get my M1 carbine to reliably hold the bolt open on 30 rd mag, needed to install a bolt catch that originally came with M2's. Yes it works on both, but seems to have been originally installed on the M2.
There seems to be two functions of a hold-open follower on most guns. Firstly, to indicate that the magazine has run dry when shooting. Secondly, to allow for removing the empty magazine to be removed and a full one placed in the gun while the bolt is still open. So my question is: Do those hold-open followers on the 30-round magazines somehow hold the bolt open when the empty mag is removed as on a 1911 et. al.?
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