My Russian Commercial Mak trigger guard is flush to the frame so I field stripped mine to see what could cause that. There's just not much in that trigger guard area to get in the way except the trigger itself and I don't see how that could cause your your problem. The trigger guard spring and plug may be the problem because that spring does apply a lot of tension. There is a parts list and schematic here: PARTS LIST - MAKAROV Accessories | Numrich Gun Parts
Hope that helps.