The Dead Air Sierra 5 KeyMo is a compact suppressor purpose-built for 5.56/.223 platforms. It pairs welded Stellite baffles with a stainless outer tube and is offered with Dead Air’s KeyMo mounting system and a 1/2-28 KeyMo flash hider. The design emphasizes durability and consistent performance under heavy use, and it accepts HUB-compatible (1.375-24) mounting adapters for configuration flexibility.

Key Specifications

• Caliber rating for 5.56 NATO and .223 Rem.
• The body length measures 4.87 inches (no adapter).
• Overall length with KeyMo adapter installed is 6.27 inches.
• The outer diameter is 1.50 inches.
• Includes a 1/2-28 KeyMo flash hider and KeyMo adapter.
• Mounting is HUB-compatible (1.375-24) for adapter options.
• Constructed with welded Stellite baffles wrapped in a stainless outer tube.
• Rated for full-auto use with no stated barrel length restrictions.
• Configured as a quick-detach (KeyMo) suppressor system.

Engineered for professional and high-volume shooters, the Sierra 5 KeyMo delivers a compact footprint and robust construction without compromising on utility. Its combination of durable baffle materials, stainless outer tube, and KeyMo quick-detach mounting makes it a practical choice for those who need a reliable, configurable suppressor for 5.56/.223 platforms. The included KeyMo adapter and 1/2-28 flash hider allow immediate mounting on compatible firearms while maintaining options for HUB-style adapters.