The SOPMOD kit is composed mostly of non-developmental items and commercial off-the-shelf (NDI/COTS) accessories packaged together to support four M4A1 carbines. [2][3] It allows for the …

Home The Clones M4A1 Block II PARTS LIST Lower Receiver Lower Receiver: Colt A2 profile Lower w/ UID Label Stocks: LMT Sopmod, Colt CAR, Magpul CTR (Various Others) Grip: Standard A2, Ergo, …

Jun 3, 2026 · M4A1 SOPMOD Block 2 clone built two ways: a strict spec-correct parts list using civilian stand-ins for the issued PEQ-15 and discontinued M951, plus a practical close-enough list of …

Another issue SOPMOD Block II did a great job addressing was the lack of rail space on the M4A1 and the first MK18 upper (with front sight post). When SOPMOD debuted the carbine-length Knight’s …

Development and Origins The M4A1 Block 2 evolved from lessons learned in early Iraq and Afghanistan deployments, where Block 1's Knight's Armament Company (KAC) Rail Interface System (RIS) …

Description Built like like the rifle specifically designed for the U.S. Special Operation Command. The SOPMOD (Special Operations Peculiar Modifcations) Block 2 Carbine Upper features a 14.5″ barrel …

Jul 7, 2011 · Colloquially we refer to M4A1s with accessories from the first block of the SOPMOD program as "Block 1," while using "Block 2" to describe carbines with the RIS II, one of the last …

Collectors building reference-correct SOPMOD Block 2 configurations. Anyone who wants the complete Block 2 upper without sourcing individual components across multiple vendors — CCC does that for …

The SOPMOD (Special Operations Peculiar Modifcations) Block 2 Carbine features a 14.5″ barrel (Pin and Weld to 16″) with Quad rail and forward handgrip, along with CQB style stock.

The Special Operations Peculiar MODification (SOPMOD) Block II is an accessory system for the M4A1 carbine comprised of a full length monolithic rail system and a heavier free-floating "SOCOM" …