The NBC‑77 SOF 40 mm CBRN Filter is a premium, high-performance cartridge designed for reliable protection against chemical, biological, radiological, and nuclear threats. Built for professional and civilian preparedness, it is fully compatible with all standard 40 mm NATO-threaded gas masks and powered air-purifying respirators (PAPRs).
 
This advanced filter provides comprehensive defense against a wide range of threats, including organic vapors, acid gases, ammonia, mercury vapors, radioactive iodine, and particulates. It is constructed with a shock-resistant hard plastic shell to withstand tough environments and impacts.
 
Weighing only 335 g, the filter remains lightweight and easy to carry while maintaining peak performance. With a 20-year factory-sealed shelf life, it is ideal for long-term storage and emergency readiness. Tested to achieve ≥ 99.99% particle filtration efficiency at 95 L/min, it delivers exceptional performance even under demanding conditions.
 
The NBC‑77 SOF ensures trusted protection for military, law enforcement, first responders, and emergency preparedness professionals.