Depends on what you're building - CT does
ships quite nicely, and _Striker_ (CT) and
MT do vehicles and most large weapons; if you
want to do personal weapons then you need to
design them under another rules set and then
convert - GURPS, FF&S/FF&S2, G3?
FWIW, _Striker_ (CT) should be in the
Classic Reprints: Games book later this year?
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Steven Hudson