If you had the choice of buying a second Glock, perhaps a full size G17 or 34 would work better. One of our club shooters used his Glock 19 for a similar reason but as we watched him become more confident, he was trying to shoot faster but missing targets completely. We suggested that he try a full size Glock. He bought a Glock 34 and his skill level increased greatly. However, if you want to build up the G19, a spring kit, 3.5 lb connector and some night sights should work. I like the Warren Tacticals on my Glocks.