Doesn't the Rokkit Eclipse Blade Samurai Ninja Kungfu thingy trigger need a sear?
Anyway, one of the good points of a roller sear, I thought, is the fact that there's hardly any wear, cuz it rollz innit?
Does the existence of these things, and the fact they are handmade mean there's actually some poor ******* somewhere ho tells his mates: Oi makez theze gubbinz wot gorra lil rolly type bally thingy in em, an oi putz da lil bally type thingies in......
Just a thought......