I agree with the above advice. Keep it stock and use the money on ammo. Better sights are the only upgrade that's worth the money IMHO.
I put a Ghost Rocket 3.5 in mine. A bit of tinkering to fit, but absolutely NO overtravel. I sold my CZ SP01 Shadow because my Glock shot better after the install...
NY1 Spring with 3.5 lb connector.
This uses stock Glock parts. The trigger pull ends up heavier than stock but has a very crisp release with very positive reset.
I like it...others may prefer stock or lighter trigger.
Wow that unbelieveable..



























