I would def recommend the Stag-15L over the dpms. I own a Stag and absolutly love it. The fit and function of it is flawless. I probally put around 3k rounds through it without and failures.
Stag 15L:
-Left Hand Ejection
-Left hand foward assist
- Left Hand Brass Deflector
- Left Hand Bolt Carrier and Assy (notches for foward assist on left-hand side, gas hole on left hand side, so your gases go out the Ejection Prt Cvr)
-Ambi Barrel Ext (Ambi because the bolt and bolt carrier actually cams in the other direction, which is why you need an ambi barrel ext)
- Comes with Ambi Saftey Selector
- Upgrade w/ Norgon ambi Catch (quick mag release)
The Stag15L is a true mirror image upper.
Dpms:
-Left hand side of the receiver is cut out for ejection, does not have a door or foward assist or brass deflector on left side.
-does not have a left hand blot carrier, so your gases go into the receiver and make it dirty, which can cause failures..