? on Thompson SMG Mags

by Slow Hand ⌂ @, Indiana, Sunday, September 06, 2020, 07:20 (13 days ago) @ Cherokee

I believe it’s to lock the bolt back on an empty mag. Helps with reloads and then the bolt is already back to fire again. My Sterling is also open bolt but the bolt closes on an empty mag so you have to rack it back when you load a new mag.


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