Bigbud,I also just purchased the same model, my first AR15. I spent $150 on a Tasco Pro Point Plus red dot scope that mounted right to the top rail. I've only shot it at a 25 yard range so far, but the red dot was awesome at that range. If you wanting to reach out to 300 yard, your gonna need some magnification. How does your's shoot ? My first 20 rounds was fine, the next 20 was jam city. I hope it was the plastic mag, and not the gun. Got some USGI mags now, looking forward to my next trip to the range.