combat machine

[Leinad]

i was wondering what kinda level of external upgrades could a g&g combat machine take?, specifically a new stock or a new hand guard?

 

also: on zero one, it gives the option to add m100 springs and bushings, what would the fps be with and without an m100 spring. and what sort or range does a factory standard have????????????????

[Rock-climby-Dave]

yup, they'll go on no worries (depending on exact type and make) but it isn't anything a minute amount of filing won't fix.