I don’t know about manufacturing. All I can relate to his research and writing. If someone comes up with a good idea and you want to use it then you have to acknowledge where you got the idea from. So at least this company should have said that they use a Sal Glesser inspired clip. Give credit where credit is due. Of course then they might have to pay royalties. Still it would be better to acknowledge the work someone else has done that to take it and imply that it is your own.
I Pray Heaven to Bestow The Best of Blessing on THIS HOUSE, and on ALL that shall hereafter Inhabit it. May none but Honest and Wise Men ever rule under This Roof! (John Adams regarding the White House)
Follow the Christ, the King,
Live pure, speak true, right wrong, follow the King--
Else, wherefore born?" (Tennyson)
NRA Life Member