Which DD Omega piston rail fits M&P15PS?

AR/M4 Custom Build Forum
1

I see the Daniel Defense Omega rails come in both small and large diameter.

The DD website says"
The Piston Omega Rail is available with two different sized top covers to accomodate different sized piston components. The Mil Spec Model is compatible with ARES and LWRC piston systems and the Large Diameter is compatible with the Bushmaster and CMMG Piston Systems. This light weight rail system is meticulously CNC machined from Aircraft Grade Aluminum and is Military Specification Type III Hard Coat Anodized. All the Omega Rail fasteners are military specification.

The Piston Omega Rail 7.0, Large Diameter Model is designed to work with carbine length AR15 gas systems and its exceptionally light weight makes it perfect for short rifles where size and weight are crucial performance attributes.

I don’t know where my S&W M&P15 fits into that and don’t want to order the wrong one. Any help would be great.

2

Ok. I’ll reply. :slight_smile:

Finally got a hold of someone at DD (all of their customer service numbers seem to go to voice mail). They say that the M&P15 has a small profile piston system and that the regular DD omega rail has enough clearance for the M&P piston system.