6.5X20X50 for a shot gun?..better re-think the power, something like a 4X fixed or maybe 2.5X7 and get a scope made for a shotgun..The El-Cheapo's won't hold up..unless you don't plan on shooting it much..and I'm sure there are some that will swear that the cheap scopes work just fine for them. I think Simmons makes a shot gun scope..if you don't have $$$ for a better one. Good Luck.