MCGs requiring modification:

There is no limit with MCGs that require some modification to shoot supplementary calibers.  New pieces that can be exchanged such as cylinders, barrels, upper receivers, etc turn one firearm into two or more.

.22 Long Rifle conversion kits for semi-auto pistols and rifles:  This is such a great concept that nearly every popular centerfire pistol and rifle has a conversion kit.  Originally popular with military forces for cheap target practice, this has bled over into the civilian shooting community that likes cheap practice too.  For the prepper, this allows one to use one gun for defense / big game hunting and quickly convert to hunt small game.  Also, one can easily and inexpensively stockpile tens of thousands of .22 LR, in a long term SHTF scenario you can keep your guns running longer.  I’d sure rather have a Model 1911 in .22LR versus a butcher knife spear for example.  Below I have listed some common guns that have kits available.

1911s
ARs chambered for 5.56x45mm / .223
Mini-14s chambered for 5.56x45mm / .223
AKs chambered for 7.62x39mm
FAL and clones
G3/HK91 and clones
HK93/33 and clones
UZI
Glocks
Beretta/Taurus 92-style pistols
Browning Hi-Power
SIG-Sauer P series
CZ-75 series

And finally, we have saved the best for last, keep reading to find out what we feel is the best option

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