Which KT guns have you seen Richard?
Ken Turner has built several stainless guns, and they were not copies of the HW design, unless we say that any break barrel is a HW80 and an underlever is a HW77… His first stainless gun made in 1982 did use a Rekord trigger from a HW35 but it had a barrel concentric to the cylinder, a cone shaped piston, ¼” long transfer port, O-rings on PTFE piston heads, Delrin pegs on piston (Lazaglide), barrel latch (like the VenomMach 1 and Walther LGV).
This guy in Poland has done a recoiless springer similar to a Whiscombe:Originally Posted by RichardH
http://forum-bron.pl/viewtopic.php?t=38715#p525101
A TX200:
http://forum-bron.pl/viewtopic.php?f...#263;#p1092346
He also did a copy of a Rapid, and a Theoben style gas ram, all of these are loosely based on the actual production guns.