Sarco Mag springs THEY ARE NOS USGI!

[imarangemaster]

That would work fine, not like they're going out into the Sonora desert
to gather dust in use...

Hahaha! Yep, that's exactly what I thought, too. I used my 30s regularly. I replaced those springs with USGI ones when Chestnut Ridge Supply had lots of USGI carbine parts. Those mags and springs are lubed with Ballistol. It is fairly good about not attracting dust and dirt, and leaves a micro film on the parts. (I actually saw a scientific review of a bunch of lubes, including Frog Lube, Ballistol, Break Free, and Hoppees. Ballistol was actually no. 2 as far as protection and cleaning!). Anyway, the 15s will be stored in a box in the safe. Bodies and followers will be lubed/cleaned with Ballistol, and the springs will have a slight coating of cosmoline.

UPDATE: I broke down all 21 fifteen round USGI magazines. I have had some of these since the 70s, and the rest since i was a LEO in the 80s & 90s. Some are virtually like new, some in between, and a few with NO finish. Some have some pitting that looks suspiciously like blood pitting. All of the followers were in great condition, even in the rusted mags.

Now for the springs I removed from the 15 rounders: Some springs were in good shape and were the same length as the new springs. Many springs, however, were compressed about 10% (or even a little more) less than new length ones, some had deformed in a twisted sort of way, and one was very rusted. Many, even if they were close to correct length, seemed "squishy" and not as strong as they should. It is very much as I expected. 70 year old springs, suffering from different levels of use or abuse, will not be up to snuff as new ones. I had several of the USGIs that didn't function 100%, and I found those were the ones with the most "compressed" or twisted springs. I expect all of my mags, even the ones with pitted exteriors, will function 100% now.