Best-of AR-15 rails What is Wedge Lock and why do I need it?

wedge lock slot   Dan wedge lock slot

Not sure if i can tell from the photo how it mounts up or accepts a scout mount? With the Wedge Lock rails getting behind the MLOK slot on

The Noble Locks Wedge slot is designed to solve the height issue of sleeker low-profile laptops Our patented design gives the lock head additional area to Noblelocks - Wedge Low Profile Lock - Noble Security Slot

bikini paradise slot png With Qubo InstaView video door phone, you can talk to visitors, see who's there in 2K clarity & unlock your door from anywhere  wedge member adapted to rest between the under cut portions of the lugs and slot of said tie