How to tune ejection pattern? in Glock Posted January 14, 2018 On 12/18/2017 at 6:25 PM, 9x45 said: As long as the cases clear the gun, or your dot, it doesn't matter. It's not like tuning a 1911. So assuming you hold your gun correctly, it won't matter, but if you have the right grip, and it still comes straight back at your face, put in an Apex extractor with a Gen 4 ejector. My kid had to put this together on his Gen 3 G17 to keep it from beating up the Docter dot. Notice how it ejects a case up and out without a magazine? An OEM Glock will not do that. Is that PSGC??