The Backplate 21 Changes the compatibility of K.P.O.S G2 17/19 to fit Glock Gen 3 - 4 (including 'C' Models), 20, 20SF, 21, 21SF, 29, 30
K.P.O.S G2 for Glock 17,18,19, 22, 23, 25, 31, 32, 37, 38.
K.P.O.S G2 for Glock 34, 35.
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