3' tall riser can be made to work as it sits. A scope and 45 degree back up iron sights with a. It will take a gas block height (taller) front sight and a standard height rear sight to shoot level. *The DPMS 'high rise' slick side upper with a. The troy explanation of high vs low is ONLY for the DPMS standard mil spec rise lowersĪfter some research, and a call back from DPMS, here is the info I have discovered. I beleive I know what the confusion is over, apparently DPMS has two version of standard or low profile, were only talking 1/4 inch or less as the pictures show, however the HIGH rise flat tops are actually 1/2 inch higer.

When i emailed troy industries about the problem they told me to run a dpms barrel nut and armalite pattern hand guard. Those who want a free float quad rail handguard will have to get one of the newer style high/low profile DMPS receivers that are illustrated in Troy's example. I'm thinking that there may not be any options for those with the ultra-high profile upper as far as continuous (no gaps) free float rails go. Notice the difference in height between the upper that Troy defines as high profile and the upper in the first picture.

Exacerbating this confusion are the interpretations other aftermarket suppliers use when describing an upper with a high profile.įor example, here's a picture of the type of upper receiver I own:Īnd here's Troy's interpretation of high profile vs. There seems to be some confusion in general over what exactly a high rise DPMS upper is. I think this post over on arfcom describes the issue pretty well:

Dpms oracle rails