Yes, Lebeda had a percussion variant & there were a few others. But I think that A&D set the bar high & other than some minuscule difference for one of Greener's design, few if any had a parallel development/evolution for a lock in a metal box. A main reason is that few paid for the APUN and almost all set back & waited for the patent to expire then capitalized with their own variations for cheaper, better, faster, etc. We'll never know, but I think it would be safe to say that if the A&D Body Action had not arrived on the scene, almost all of the other locks in a metal box may not have been devised. The concept was that influential.
Kind Regards,
Raimey
rse
