sling studs on FX Independence .22

I'm sending my brand new fx Independence .25cal back today for repairs . Pump it up to 220 Shot it one time and pumped it 65 times and it still wasn't full On the gauge dam it hunting seasons almost over here hope they get this thing fixed fast .I'm sending it back I'm going to have them add the sling studs they said they weren't sure if it would work but i'm definitely going to have them add it now .kinda sucks on long hunts for squirrel or rabbit and not have a sling