and conversation should start with bottle of vodka )))wich usually means you have to know the right russian to talk...
We need it in 12.7x99, otherwise it is a large tomato plant stick.
The Barrett is a well known scary looking rifle, that's why they're prohib, not the calibre or action.Isnt a semi .50 a sketchy subject here? or was that just the barret cause its american? cant remember it was like 04-05 when that stuff changed if i remember correctly.
In that case...
http://www.zvi.cz/en/products/sniper-rifle-falcon.html
http://www.zmt.tarnow.pl/produkcja-wojskowa/127-mm-wielkokalibrowy-karabin-wyborowy.html
http://www.zastava-arms.rs/cms/index.php?id=90
http://www.truvelo.co.za/armoury/content/counter-measure-sniper (scroll down)
http://www.pgmprecision.com/en_US/fusils/hecate2.html
These all come in .50 BMG. They are not semi-auto, but they ARE magazine-fed, some are bullpups and I'm pretty sure none of them are available in Canada yet.
The ONLY 2 worth looking at are teh ones by Truvelo and PGM. The other ones you listed are really really really crappy.
JR