This is to protect damage to the rifle when zeroing off a bench. Instead of laying the gun on it's side in between shots, get some of the rubber jawed plastic clamps sold by DIY/Homebase for clamping woodwork.
Clip the jaws onto the front of the stock/receiver and it acts as a bipod, keeping the gun upright 'til the next shot.

One of JDP's many tips
Mick