Just bought extended 6 port barrel for glock 34 9mm. What other upgrades would u suggest? Recoil spring weight, extractor modification or replace, best ammo, etc? Thanks
What type of ammunition are you using? A 6 port barrel is alot of porting for a 9mm. Generally people have to drop down recoil spring weight to 11-15 pounds. I personally recommend 11 lbs.
I would start with a SS guide rod and an 11 lb recoil spring and go from there.