Burris makes a Surefire III red dot scope. I have one on a MP15, and it shoots well. about half the size of an Eotech, smaller view window, but very accurate. I believe they retail at about $249. You might need a picatinny rail riser to get it high enough to sight thru. Riser rail good prices on amazon. local shops want like freakin $60 when amazon has em for like $20.

Happy Holidays
Chuck