Hello everyone. Just purchased my first AR rifle. A S&W M&P15 Sport II. I am a member at my local indoor gun range that is at max, 25 yards. My question is, if in the future I wanted to buy a scope, would it make much of a difference at 25 yards, and if so, what would be some bargain scopes for that distance. Also, would a red dot make sense to purchase if I’m only using this for target shooting at this distance? I plan on getting used to the weapon in its stock form for now, but was just curious for future reference. Thanks in advance for any help. Have a safe and happy new year!