http://www.gatewaytoairguns.org/GTA/...p?topic=7025.0
Nothing against Tim - he does great work - but personally (and the route I'm going to take for my .25 Disco) I would get a LW barrel, Marauder trigger group, RVA, extended probe bolt, streamline the valve a bit, maybe a repeating breech (BNM ?), and voila...no reason why it should be any less accurate or efficient as a Mac1-prepped Disco. Then you WOULD be "buying Canadian" as I'm sure Eric has everything you would need, except for the repeating breech (if you even wanted one).
Just my opinion,
Todd