I have an AR 15 with 20" barrel and want to buy a scope for it but have no idea on what scope to get. I will be shooting out to 300 yds maybe a little more. Can you guys recommend a decent scope that will not break the bank ?
Depends on the bank. My bank and Donald Trump's bank are completely different things, and we have no clue what side of the spectrum you are on. "Break the bank" has no numeric value.
If a fixed power would work for you, the SWFA SS 6x or 10x would be the best quality scope option, hands down. SWFA SS 6x42 Tactical Riflescope
For a super cheap option that has lots of "tactical" features and actually gets pretty good reviews, the Primary arms 4-14x is FFP and Mil/mil: https://www.primaryarms.com/Primary_Arms_4_14X44_FFP_Scope_p/pa4-14xffp.htm Primary arms also makes mounts. They are about the cheapest I'd go with, and they work fine for the money. Overall, the SS would be the way to go if fixed power would work for ya.