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Sight Set Question

Discussion in 'Competition Shooting' started by 9mmepiphany, Mar 12, 2013.

  1. 9mmepiphany

    9mmepiphany Moderator

    I usually just shoot whichever sights come on a gun...except Glocks...fairly well, with the only usual modification being blacking out any rear dots. But I've gotten to the point with my M&P9 that the factory sights aren't cutting it anymore...so I decided to replace them.

    I vaguely remember a mathematical equation to determine impact deltas corresponding to sight height deltas, but I'm having a brain fart...plus I've gotten pretty lazy over the years. So, onto my question.

    I've been looking at the 10-8 sight set which says that the correct pairing for the full size M&P is a .160" front sight (fiber optic)...I'm looking at a .100" width. So I happen to be on Speed Shooter's Specialties and found they they sell the 10-8 rear for a bit less...and I can save on shipping when combining it with other purchases.

    But they don't carry the 10-8 front sight set. What they offer are front sights by Dawson Precision..OK, they're a good company. But they don't offer a .160" front sight in the .100" width...they do have a .115" wide in .160" height

    What they do offer in the .100" width is .155" or .170".

    The question would be how much impact change would you expect, at 20-25 yards (IDPA), with a front sight that is either .005" taller or shorter?
  2. mgmorden

    mgmorden Active Member

    Dawson Precision provides a page for it on their site that explains the equation:

  3. 9mmepiphany

    9mmepiphany Moderator


    That was relatively painless, especially using Reverse Polish Notation in my HP calculator (yup, I'm old)

    So, I'm only looking at a POI change of .55" @ 20 yards. I'm thinking a little high is better than a little low...plus, who'd notice in a 3" group ;)
  4. waktasz

    waktasz Member

    They will make you whatever height you need, assuming they already make the width you require.

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