G20 is the AR-15 of the semi-auto world
my G20 SHTF kit is:
.22 upper, g21 upper, Guncrafter .50 upper and the full g20, with that and appropriate barrel (spring) swaps I can fire the following.
.22
9mm luger
9mm dillon
357 sig
.40
38 super
40 super
.45 acp
10mm
400 corbon
460 rowland
.50 beowulf
I am currently trying to add 380 to the list. My 12 gauge coach gun can fire 20 different calibers to include black powder using adapters.
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