Can someone please tell me which Kel Tec RFB Brake this is?

[superlative]

please give me the name, or even better the source for this brake. Thanks!!

 

[superlative]

anyone? Thanks.

 

[hicaliber]

Could be one of these?
http://kahntrol.com/

 

[alpha niner]

Could be one of these guys here...
http://www.grizzlygunworks.com/