I understand that you think you know what you're talking about, but you don't. 1) if by close ended you mean a blind hole, it's not. it has a weep hole. 2) plastic and steel have very similar friction coefficients, with steel actually slightly less. 3) there is no steel on steel friction because the spring cups slightly offset that from happening, regardless. 4) steel on steel friction in the striker channel is no different than the steel on steel friction of the extractor depressor plunger on the extractor, barrel lugs on the locking block, etc 5) I have a 102 year old 1911 which has no channel liner in the firing pin channel. it functions fine. 6) "do you have another reason why the [glock] always goes bang" is an argument from ignorance. just because you do not have the answer does not mean that it isn't wrong. I have seen glock malfunctions on several occasions, including from a warp in the channel liner.

great reply. i like it. never seen a channel liner warp. didn’t see that one coming. steel needs oil. oil makes gunk. the weep hole is for moisture and won’t drain gunk. gunk will actually clog the weep hole. I think the best solution is to maintain your plastic channel liner, which is not easily accomplished. it loves to stay down in there. another solution would be an entire NP3 striker parts kit with NP3 channel liner. i’ll look into this 1911 channel wear phenomenon. cheers