Can Yall tell me anything about my saiga? I know it's converted. I would like to know when it was manufactured. Can I swap out my collapsible stock out for other ar stocks if I want to upgrade? What is this "empty hole" in the foregrip? Is there a way to change the tip of the barrel to add a flash suppressor? I like the look of them. If it makes. Difference, it is a 7.62x39. Thanks Yall.