Ocl M4 Collar Black

The Ocl M4 Collar Black is a precision-engineered suppressor locating collar designed for shooters and operators who demand exacting tolerance and repeatability in their suppressor mounting systems. Built by Otter Creek Labs for use with M4 spec barrels and Ops Inc 12th model suppressors, as well as AEM5 and OCM5 sound suppressors, this collar ensures consistent baffle stack alignment and minimal point-of-impact shift between suppressed and unsuppressed fire. Whether you're running a dedicated short-barreled rifle, a precision 5.56 NATO build, or a tactical carbine, the Ocl M4 Collar Black delivers the mechanical accuracy that separates reliable systems from compromised ones.

Manufactured from H900 heat-treated 17-4 stainless steel and finished in a durable black nitride coating, the Ocl M4 Collar Black resists corrosion and wear in harsh operational environments while maintaining dimensional integrity across thermal cycles. The nitride finish provides superior hardness compared to standard black oxide, protecting against carbon fouling and mechanical degradation caused by repeated suppressor attachment and removal. Heat-treat to H900 specification ensures the collar maintains its precise bore geometry and thread engagement without deformation, even under the vibration and pressure cycling inherent to suppressed fire. At just 0.13 lbs and measuring 1 × 1 × 2 inches, this is a minimalist component engineered for function, not aesthetics.

Operators relying on fast-attach suppressors—particularly those running Ops Inc suppression systems or Otter Creek Labs products—will find the Ocl M4 Collar Black essential for maintaining zero and reducing subsonic/supersonic transition artifacts. Precision shooters conducting rifle audits or suppressor validation will appreciate the collar's role in isolating suppressor mounting variables from barrel harmonics. Installation is straightforward: thread directly onto M4 spec barrel threads and secure your compatible suppressor. For law enforcement tactical teams, military end-users, and serious sport shooters invested in sound suppression technology, this collar is a non-negotiable upgrade that ensures every shot breaks from the same point of mechanical reference.