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My gen 3 and gen 4 AA kits for large frame Glocks were frustrating to say the least. The only thing that ran somewhat reliably were 40grn Mini-Mags and of all things, Remington Golden Bullets.
I bought a Gen 3 kit for my G22 last month. I purchased it from a company that imported it for me (not a site sponsor). I have a Vortex Venom mounted with an MOS plate. It took about 200 rounds to break in and now it runs almost flawlessly.