All of the converted Brens are actually using original Bren receivers that are welded back and converted to satisfy the gestapo at the BATF, one of my bud's, Pirate, down in Miami is one of the builders for these receivers. He also sells the jigs for rebuild of the receivers.
Stan's site (Pirate)
Bren

Wiselite is the other re-manufacturer of the Bren and they also re-utilize the demilled receiver.
Bren~Build services - www.wlarms.com

Whatever happened with the gestapo's OAMGAAMG, guess they pick and chose as they like.

My dream milsurp would be a mint trapdoor ahhhh a nice 45-70 thumper!!

Dan