Looking for a sling for my Shockwave - It has the magizine tube end cap and grip studs already installed. Do I have to get a sling with "swivel" studs to fit this, or will other type of sling hardware also fit these factory studs? They are pretty tiny, so I don't know if the 'hook' type would fit and maybe only the small swivel studs will work? As far as shooting birdshot - what is a "safe" target to shoot and how far away does it need to be so not to have pellets bouncing back at me, which would be bad. Should I stay away from steel tagets? Obviously the shockwave is a short range gun... so I'm not going to be 50-75 yards away... I just want to be safe. ... buckshot is different I know, but I assume I would also want to stay away from steel targets to avoid any type of bounce back?