I found a crap ton of these spent on the ground, they looked different, the casing was ailver and the bottom extended out? I will post a pic latEr
So how does it work? Is the plastic end fly out of the barrel? Or it stops at BFA adaptor?
Yup, force on force brandProbably Force on Force brand
http://www.forceonforce.com/
I have found fired ones also.
A third similar brand is UTM
https://www.utmworldwide.com/