Originally Posted by sgtlmj
All Glock RSAs fall out of the assembly notch the first time the slide is cycled. That's why if you just take the slide off without disassembling it further, you need to make sure to push the RSA back into the notch before returning the slide to the frame.
The function test for spring pressure is to point the pistol straight up and let the slide ride forward while keeping the trigger pulled to the rear.
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