Originally Posted by Olympus
Your best bet would be to just save up for a new gun altogether. RIA Tactical models will have better sights. Trying to upgrade a GI model is an uphill battle.
If all he wants is better sights. It's not a huge investment to upgrade. Now if the ultimate goal is to fully customize, and go with a beavertail, a custom trigger, sights, extended controls, then, yes a different model may be worth it.