Guide rod swapping different pistols (FN509 & G19)

[VancouverS4]

I own an FN 509 Tactical, great gun but as noted by many reviewers it is over-sprung, even with the included softer factory rod and spring installed. After 2000 rounds it sometimes will not eject tuned rounds that function perfectly in other 9mm and with a comp on it it wont eject anything at all. A slow-mo video showed me what I suspected that the slide doesn't cycle with enough energy rearward to eject, clear the mag and strip a round.

My solution was to put in a Lonewolf Glock 19 guiderod and ISMI spring. Now it functions flawlessly and as a bonus shoots flatter. The G19 guide rod is about 0.5cm longer than the FN.

My question is would this cause an issue with the slightly longer guide rod?

 

[sky52]

You answered your own question. You said it functioned flawlessly.

What i would do is do a long term observation and see if there are ill-effects. I am safe to say that you are probably 1 of the first few people who had done that.

On mine, i never even put in the softer recoil spring. I shoot wholely 124gr AE, which some people say its a little hotter than the rest.