When I took my Sport II to the range and it was a max 25yds I thought no problem with my iron sights,I was wrong.As you can tell from my acct name I'm an old guy(73) and 25 yds is to long for accurate shots.I have read a lot on magnifiers behind a red dot,but what I understand it's fairly heavy and I would like to avoid excess weight.So,you guys with older eyes or problems with your eyes,what do you use or recommend.I will probably never shoot over 100 yds,probably mostly the 25 yd range and home defense.Probably for home the red dot would be ideal,but would like to shoot a little longer.