Im in the process of building my Rifle.. Going to order the DMPS Lower and have it shipped to my FFL.

 

I want to buy the matching DMPS upper (http://www.midwayusa.com/viewProduct/?p ... ber=253994).

The upper comes with GlacierGuard handguards.

 

I want to replace them with the UTG Quad Rails.

 

My question is. WHAT SIZE RAIL DO I NEED? I was thinkin the shortest 6.5" quad rail.

 

Are the Rails sized to the barrel length? Somebody please educate me on this.

youd need a carbine length handguard. not rifle or mid-length. the shortest one you can find, i think its 6.5"

For that upper, you'll need a carbine length which is 7". FYI, UTG is a manufacturer of airsoft gear.

 

Rails and handguard length are determined by the gas system, not the barrel length or contour. Even then, you could put a low profile gas block on there and run a rifle length or midlength rail if you wanted to.

I havent seen any in 7". I was looking at a couple NC star ones in my Cheaper than Dirt catalog. All i can find are the 6.5 and 12"..

 

All i can think is that maybe the delta ring adds .5 inch to the legnth?

I havent seen any in 7". I was looking at a couple NC star ones in my Cheaper than Dirt catalog. All i can find are the 6.5 and 12"..

 

All i can think is that maybe the delta ring adds .5 inch to the legnth?

 

http://www.skdtac.com/LaRue_Handguard_R ... rt.405.htm

http://www.skdtac.com/Daniel_Defense_Om ... df.101.htm