DPMS lower gas block rail front sight?

[Catpop]

For some reason DPMS made their AR-15 Oracle model gas block rail with a height lower than reciever height rail. This complicates the buying of a rail mount sight set.
How does one buy the correct sight to match up with the standard height rear sight (which I already have)? What does one ask for?
I did notice Brownells has a clamp on riser block- would this solve the problem?
Thanks for the help!

 

[USAF_Vet]

I used a riser when I had that set up on mine. Random luck that it was tall enough with the front sight I used.

 

[The Bushmaster]

I have a DPMS AR 10. Same problem. Solved...Leaper UTG-MNT.

I mounted the MNT-751 and MNT-951.

 

[Catpop]

Thanks for input.
I measured mine and it appears to be "roughly" 5/16" lower than the reciever rail. I say roughly bc my straight edge hits the handguard and I have to guess a little.
I picked up a "USMC" marked folding rear sight the other day at the gun show. It is marked with 2-8 graduations. I think it is pretty nifty. Now I'm trying to find a front sight to make it work out.
I have a scope on it now, but am old school and like aperture sights.
Thanks again

 

[rbernie]

Most railed gas blocks have been lower than the railed section of the receiver (which railed forearms duplicate). This is why many flip up sights are available in two heights; one for railed forearms and the other (taller) version for railed gas blocks. For example:

http://www.midwayusa.com/product/38...t-sight-gas-block-height-ar-10-aluminum-matte

http://www.midwayusa.com/product/45...ght-gas-block-height-ar-15-lr-308-steel-matte

http://www.midwayusa.com/product/18...ing-detent-gas-block-height-ar-10-steel-matte