Sometimes referred to as a quick release cam buckles, these have been in use since the ALICE gear era and are still used on cool guy slings today.
Metal Quick Release Buckle, 1 for Sling Applications, Berry Compliant – Rockywoods Fabrics
Kinedyne 2 by 16' Spring Loaded Logistic Cam Buckle Strap
Down River Equipment
2 inch Cam Buckle Hardware 3000 lbs
Spring Loaded Quick Release Cam Buckle 1 (Sold per Each) - CAT Outdoors
Quick Release Cam Buckle Spring Loaded Rapid Adjustable Dentation
Uonlytech 16 Pcs Box Flight Case Buckle Toggle Woodworking
Stainless Steel Spring Loaded Cam Buckle - China Stainless Steel Spring Loaded Cam Buckle, Cam Buckle
Mac's Tie Downs Motorcycle Cam Tie-Down Strap with Integrated Soft
Buy Sturdy spring loaded cam buckle For Varied Purposes
12' Cam Buckle Logistic Tie-Down Strap - Yellow
ITW/AB Rapid Adjust Spring Loaded Cam Buckle For Rifle Sling DIY