what that guy said"JimNM"I politely disagree with the red dot scope recommendation. I have had a few different red dots and feel that they are not worth the trade off. For fast acquisition, dots are slightly better, but for any thing that resembles precision the red dot scope fails the test.
In my opinion and experience, your milage may vary.
I politely disagree with my friend in NM. This a good suggestion because you are keeping your ranges less than 20 yards. Even a 3 MOA dot only subtends 3/4 of an inch at 25 yards so the red/green dot in your application will certainly be "accurate" enough and it will be much quicker than a scope."DaBinChe"a red dot might be better then a scope at those ranges