brian33x51
New member
I have I think a gen1 glock 20mm (preban even). I bought an aluminum guide and replacement spring because the stock spring was clearly too weak for 10mm loads (I recall having more than a few boxes of american eagle), I could feel the slide slam into the back of the pistol. Works fine with .40 ammo of course. I assume the newer 10mm glocks are sprung better out of the box? Tensioning that aftermarket spring more than sucks every time I clean it.