mp5 build...suggestions? opinions?

[Reckless]

okay asked before about a mp5 front end for a build... think I've worked that out.


now for the guts :hammer:

the base is a TM mp5 ... but I would like to take all the stock TM guts out and have them set aside for back up parts or resale.. etc

I have most of the parts picked but I need some help from the community

heres what I want to run

TK twist inner barrel - 343mm (IIRC)

systema "turbo" 1J (330fps) complete gearbox

Trigger master mosfet ECU

11.1V lipo in handguard

Guarder soft (clear?) hop up rubber

H shaped hop up

Laylax strike hop up adjuster thing (I can't remember the full proper name...sue me)



now... does anyone know if there is a metal hop up housing available for MP5? or can anyone think of something I missed? ... I was also looking at like a G&P reinforced gearbox, with a M4 sized cylinder set .. and the modify smooth high speed gearset... but I think the cost comes out about the same once you get all the bits as the systema complete gearbox