With not being able to set up and shoot due to Covid restriction, I'm hoping to get back on our club range on Monday next.

I have fitted the Sabre Tactical Rail and watched the Airgun101 Review video using the 2 shims, however in the same poly bag there are 2 miniscule rubber pips Ca. <1mm diameter.

I have no idea what these are for, or if they are actually of any use.I'd be obliged if you could help
Regards, Steve