Kinda works - Faxon Firearms EXOS-553 Glock Pistol Compensator

I have this on a G47. Before the comp, this gun me a good bit of money being probably the most accurate gun I shoot for unlimited. Now that I installed the comp, the factory spring with both 115gr and 124gr doesn’t even think about running. So I got a 15lb spring. Still didn’t work. Finally got the 13lb spring and it will cycle 124gr but still iffy with 115gr. Now that it works I have noticed a significant point of impact shift and lack of consistency when I shoot at 15 and 25 yards. (15yd zero on the gun should be 1.5ish high at 25) Not sure if this is a ammo or a comp issue. I never get frustrated when zeroing a gun but this one had me over the edge constantly chasing the zero. I will give it one last try before I have enough of it and return it. As far as recoil, job well done. Significant reduction.