PCM (Panel, Cable Management) it is an MLOK compatible cable management panel/cover that protects and routes the cable underneath. TNVC and FCD had determined that internal/protected routing of cable is the most secure means of keeping it immobile, as it doesn't rely on friction, and can't be pulled out without removing the panel itself. PCM makes it possible for the cable to go straight through, or round a 90 degree angle, or even a 180 degree turn. PCM's cable routing can accommodate cables up to 0.140" in diameter. For references, Surefire's cables are 0.115" average, while the thickest Unity Tactical cables are 0.140 average. Billet machined from solid 6 Mfg: Forward Controls Design