Internal parts to build a race gun (TM Hicapa 5.1 base)?

[GacktC]

Hello all,
I wonder what internal parts do I need to set up a race gun base on a Hicapa 5.1.
I think the tightbore is A MUST, but what other parts/components do I need?
Thanks a bunch!

[VogonFord]

I'd go for a new barrel, new bucking (VSR type), high-flow valve and of course a new slide. If you're planning on running with it in games stay with a normal barrel, if you're planning on using it for close-range competitions use a non-hop barrel - it will increase your accuracy but decrease your range.