Poor quality and brittle. - Otis Technology Bore Reflector Plus

I bought 5 of these and 3 of the 5 have broken just under the pressure of the buffer in storage in under a month, two of which causing bothersome bore obstructions.
I would not recommend these to anyone as they hardly do their job and then getting plastic stuck in the barrel that you have to punch out with a cleaning rod is really not what anyone should expect out of a product like this.
The price is expensive too, this type of product could cost maybe 5¢ to manufacture so I figured the price might justify the quality but I was clearly wrong.