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Old 06-18-2019, 08:27 AM   #40
fula farbrorn
 
Join Date: Nov 2014
Default Re: NIJ Levels in DR Ratings

Quote:
Originally Posted by Icelander View Post
While the protection against other threats can be hard to estimate, the ballistic protection of NIJ Levels in GURPS is pretty straightforward and fairly accurate (as accurate as a single rating can be).

NIJ Rating
Level II: DR 10
Level IIIA: DR 12
Level III: DR 25
Level IV: DR 36

All DR ratings are the minimum required to pass testing for this level of protection. Technically, NIJ Levels are not inclusive and the real-world factors that govern penetration are sufficiently complex that it is theoretically possible to pass Level IV testing, but fail Level III, for example (hardened steel plates of a certain thickness might stop 166 grain M2 rounds from .30_06, for example, but fail against high-velocity 55 grain M193 5.56x45mm), but as GURPS only gives a single DR rating against all bullet types, such complexities are ignored unless a GM feels like adjusting DR ratings against specific projectiles at specific velocities.

How would we Stat up a NIJ III/IV vest ? they do exist and are becoming more and more prolific

one possible solution would be to adjust it into something like this

Level II: DR 10
Level IIIA: DR 12
Level III: DR 25
Level IV: ?? ??
Level III/IV: DR 36

Not sure what rules or DR it would benefit from though

https://www.vestguard.co.uk/hard-arm...-iiiiv-34.html
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