It's over the bolt folding , so right side. Check dealer/manufacturer www.pautac.fi they ship worldwide.
Prices in site are in EUR and include VAT 24%, that you don't need pay VAT when they export.
TRG's are very nice rifles, they are very accurate and triggers are superb.
Magazines and accessories are bit more expensive than other brands.
In picture my TRG 42 with PAC stock.