by xandman » Tue Feb 26, 2013 5:36 pm
If you need just the GB I would suggest a Prowin GB its gonna be expensive but well worth it. A few chinese companies made a few like the prowin (AABB made one) but not as good quality as a prowin.
ProWin- Back of the GB can be taken off
Here is a list of a few companies that make GBs with the ability for a quick change if you want to start from scratch
ICS- Upper and lower GB separate
ARES- Back of GB has a proprietary spring guide that you can swap springs
STAR- see ares ^^
WE Katana- taking an idea from Systema by having cylinders you can swap out.
Systema PTW- A waste of money in my mind but you can swap cylinders for power changes
Celcius- PTW clone
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