AR 15 Front Sight Mount Question...

[mrmarkda64]

Greetings,

I've searched and searched the internet and forum to no avail. I think my question might be somewhat unique due to the nature of the upper receiver I purchased.

I bought a DPMS flat top receiver with a 20 inch 1-8 twist stainless steel bull barrel and free floated hand guards. The receiver has a raised flat top in order to aid in proper optic height (as described on the midwayusa description, and it appears so in person as well).

The gas block has a small piece of railing on top of it as well, but is the standard gas block height.

Now, normally I would assume that with receivers bearing a normal (non-raised) flat top rail, that a gas block height front sight along with the standard rear sight would work.

I can't seem to find any information on whether I need to add a riser to the gas block and mount a gas block height front sight atop the riser.

When I contacted DPMS, they didn't seem to really understand my question and directed me to buy a gas block height sight.

It just doesn't make sense that a standard gas block height front sight would be suitable for a receiver bearing a raised rail.

Perhaps I am crazy and over complicating things. Please help....

 

[rcmodel]

I think you dug yourself in a hole when you bought a Hi-Ride upper.

They don't work worth squat with red-dots, or iron sights.
Way to High.

They are only good for using Low scope rings instead of Hi scope rings.
And IMO, not worth the trouble due to the incompatibility issues they cause with every other sight ever made for an AR-15.

I suppose you could use a riser block clamped on the gas block, with a front sight clamped to that.
But it would be less then ideal as the iron sight line would be way above where you would normally find it.
And thats adding too many stacked clamps to get knocked around for my liking.

Any chance you can return it to Midway and get a standard height flat top upper?
It would simplify your life considerably!

rc

 

[mrmarkda64]

Hey cool, I think I've read loads of useful info from you on KTOG!
Super neat that you responded, thanks!

I'm glad you brought up the point you did.
I'm stuck between just sticking irons on the thing or just mounting an optic.

Because hunting season is starting, scopes are 'on sale', but really, they're a little higher than normal, and they'll be on 'real sale' in December or January-ish.

I started getting a little antsy at the thought of waiting until December to buy the optic and thought I might just grab irons and be done with it.

Guess I'll wait after all.

So, I can use low rings with this receiver? I plan on buying a 2-7x scope by either Leupold or Nikon, and might even go for an objective diameter of 33 or so with a shotgun scope...

 

[rcmodel]

Yes, that's it's only reason for being.

rc