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This month's Q&A theme is submachine guns:

0:00:41 - Do different nationalities have culturally distinctive submachine guns or gun features?
0:04:25 - What was the first SMG? German or Italian?
0:06:11 - Magazine loadouts for submachine guns
0:08:08 - Why is the MP5 still viable and popular today?
0:11:09 - Do SMGs still have a role in light of short carbines and .300 Blackout?
0:14:55 - Would 10mm close the gap between SMG and rifle?
0:20:19 - Why no SMGs in .357 Mag or .44 Mag?
0:22:35 - Why is the Sten magazine bad, and what makes a good SMG mag?
0:27:01 - Does the US military still have any issued SMGs?
0:28:06 - Did the Sten really have problems running away?
0:30:16 - Why no British SMG before WW2?
0:32:21 - Difference between PCC and SMG
0:34:46 - Why re some 9mm mags straight and some curved?
0:36:18 - Why are people still making simple blowback SMGs today?
0:38:13 - Why so little development of open bolt SMGs today?
0:40:15 - Coupled magazines for the UD42
0:42:50 - Where would one go to learn to shoot submachine guns?
0:43:58 - Without Knob Creek, are there any more national SMG matches?
0:45:04 - The MP5 trigger is pretty bad - is that normal?
0:46:17 - What would SMG development have done if battle rifles stayed in vogue?
0:47:11 - Mass-production SMGs not in 9mm? (And also not in 7.62x25 or 45ACP)
0:48:53 - Most fun full-auto .22?
0:49:52 - Does the quality of first-gen SMG manufacture have a benefit?
0:51:12 - Is the PDW dead?
0:54:07 - The specialized Remington-Thompson .45 cartridge
0:55:43 - What SMG for time travel to medieval Europe?
0:57:00 - Why no US SMGs in .38 Super prior to WW2?
0:58:55 - Why not more bayonets on SMGs?
1:01:01 - Magnet-delayed or magnet-buffered designs
1:04:47 - Burst limiter utility in machine pistols