This is a 1916 Gew 98 Mauser, and I would like to know what it may be worth. The bolt, barrel, and receiver are matching, but the stock does not appear to be original and it looks like someone tried to drill it for a side mounted scope then filled it in. The barrel is dark and has some pitting. I've seem similar guns for sale online for around $400, but I'm guessing this one is worth less. Lock-up is solid and I do not see any import marks. Please let me know more about this rifle. Also, is it still C&R if the stock isn't original?