No, they did'nt get the BTF issue fixed on the gen4's I have 2 gen 4 g19's both needed an Apex extractor, and in the case of the last g19 I bought, even that did'nt help much. I know enough not to bother Glock about it as they will do little to fix it. This is why I'm so interested in the CZ P-10c, same size as g19, NO BTF.....