Correct Rail Protection for the M4A1 Block II Clone
The Daniel Defense RIS-II (Rail Interface System II) is the centerpiece of the M4A1 SOPMOD Block II upper. Running unprotected rail on your Block II build chews up hands, snags kit, and looks wrong in the mirror. These three Ergo Original Rail Ladder Covers in Flat Dark Earth are the textured-grip polymer covers commonly seen on Block II rifles fielded by USSOCOM and conventional forces from the SOPMOD II era forward.
Each pack includes three full-length ladder-style rail covers designed to snap onto any MIL-STD-1913 Picatinny surface. The ribbed ladder profile delivers purchase without shredding gloves, while the FDE polymer pairs cleanly with Daniel Defense's factory FDE cerakote and anodized hardware on RIS-II rails. Install by hand — no tools, no fuss — and cut to length with a sharp utility blade when you need to clear a light, laser, or backup iron.
For the clone builder, these are the covers you see in archival photos of Ranger Regiment and SF rifles running the RIS-II. Close is not correct. Get it right the first time.
Order your 3-pack of Ergo FDE Rail Ladder Covers today and finish your Block II clone the way it left the arsenal.
