CCI Phantom, 32 Degrees T-Stock, Armson Pro Red Dot Sight
Light as a feather, less friction, more durable than the stock hammer.
A bit pricey, might be tough to adjust for initially.
I use this hammer in conjunction with Tippmann's low pressure kit, and it's excellent. Light, literally fast enough to outshoot an r/t, very low friction (oil the o-ring though), basically exactly what I was looking for. The fact that it's light and low friction translates to the ability to tune for excellent efficiency (when combined with the low pressure valve, at least). It also contributes to excellent consistency, although on it's own the effect would not be as dramatic.
It is a bit on the expensive side, considering that it's just a hammer, but with the right setup, it's well worth the price. It might take some tinkering to find the right velocity when you first install it, because it's so light.
To really work best, it should be used with an RVA and a low pressure setup. On it's own it won't make an enormous difference, but it helps.
This helps a lot. I've been thinking about replacing the lpk bolt with the lite version but I wasn't sure if it would work. Did you use the stock spring and what operating pressure is your setup running at now?