AR Rail 1/8" lower than reciever

[maroonandwhite]

Would 1/8" difference between the rail and upper reciever matter when dialing in iron sights? I know some railed gas blocks are lower but it's usually more than this.

 

I would think the front sight would have enough adjustment for this.

[maroonandwhite]

Well it's actually about 1/16" lower so I'm really thinking I shouldn't have a problem.


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[cj0e]

Should be able to adjust for it. If you can't, then buy a replacement front sight post that is taller, and adjust with it.

 

It won't be a whole lot, but remember that the free float hand guard may flex  a little as you hold it / rest it on bags / etc. It could be enough to throw off the shot more than your 1/16th gap offset causes. It could also loosen, shift, etc under really hard use.

 

For example, when I use a very aggressive grip with my 15" Samson Evo rail (on a 20" gov profile upper) it flexes considerably. Same goes for when I have a bipod mounted and loaded.  I had to actually shave more off my low profile gas block (shaved FSB variety) to keep the rail from contacting it when shooting.

[Dolomite_supafly]

You can also put a spacer between the sight and the rail to raise the sight.

[maroonandwhite]

Should be able to adjust for it. If you can't, then buy a replacement front sight post that is taller, and adjust with it.

 

It won't be a whole lot, but remember that the free float hand guard may flex  a little as you hold it / rest it on bags / etc. It could be enough to throw off the shot more than your 1/16th gap offset causes. It could also loosen, shift, etc under really hard use.

 

For example, when I use a very aggressive grip with my 15" Samson Evo rail (on a 20" gov profile upper) it flexes considerably. Same goes for when I have a bipod mounted and loaded.  I had to actually shave more off my low profile gas block (shaved FSB variety) to keep the rail from contacting it when shooting.

 

 

This is only a 10.5" barrel so the guard is like 10". It seems pretty solid too so hopefully that won't be an issue. I'm on the fence now about going with a nice set of fixed or folding irons for my primary of just running Magpul MBUS with a red dot. I just don't have any hands on experience with anything other than MBUS in order to make a decision.