That is one of the benefits of old-school, single stack magazines, innit? I was late in getting around to actually firing full auto weapons from Der Krieg, but when the time arrived I found out PDQ that some of the submachinegun magazines didn't load quite as easily. I also got to compare the MP40 and M1A1 Thompson side by side, and began to understand why my uncles loved the "Tommy Gun."
If the P-38 owner ever wants to get a correct holster for his 1941-date P-38, they are available:
https://www.germanmilitaria.com/Heer...s/H077382.html