The efficacy of less-lethal force is entirely dependent on the predictability of the projectile. For years, tactical units have noted slight variations in the performance of 40mm kinetic rounds when deployed in extreme weather. As of May 2026, a new initiative led by national testing laboratories is seeking to formalize a 'Standardized Impact Velocity' (SIV) for all kinetic impact munitions. This effort aims to provide agencies with a guarantee that the force delivered at 20 meters in a sub-zero environment is identical to the force delivered in a desert climate.
Key Details
The focus of the new standards is on the 'compression recovery' of materials like closed-cell foam and the structural integrity of fabric-based bean bag rounds. Testing data released in early May indicates that some current-generation foam rounds can harden in temperatures below freezing, significantly increasing the risk of blunt force trauma. Conversely, extreme heat can cause some materials to soften, reducing their effective range and accuracy. The proposed NIJ 0101.07-compliant standards will require manufacturers to submit projectiles to a wider range of thermal stress tests before they can be certified for law enforcement use.
Broader Context
This drive for standardization is part of a larger movement to professionalize the less-lethal industry. As these tools become more central to daily policing, they are receiving the same level of scientific scrutiny historically reserved for ballistic vests and duty firearms. The shift toward 'SIV' certification is also a response to the increased range of 40mm systems. With modern launchers capable of accurate engagement at 40 or 50 meters, the margin for error in projectile ballistics has narrowed. Consistency is no longer just a technical preference; it is a safety requirement.
Implications for Law Enforcement
Procurement officers must begin prioritizing SIV-certified munitions in their upcoming budget cycles. Relying on older, non-certified stockpiles may expose agencies to liability if a round performs outside of its expected parameters. Furthermore, trainers should incorporate these environmental considerations into range qualifications. Officers need to understand how their specific equipment may react to seasonal changes. From a strategic perspective, having standardized munitions allows for better inter-agency cooperation; when multiple jurisdictions respond to a single event, command staff can be confident that all units are operating with equipment that meets the same rigorous performance benchmarks.
Conclusion
As less-lethal technology continues to mature, the focus must remain on the scientific validation of the tools we provide to officers. The move toward standardized impact velocity represents a critical step in ensuring that less-lethal force remains a safe and effective alternative to more severe measures. For command staff, the message is clear: the reliability of the projectile is just as important as the training of the officer behind the launcher.
