I got a new 5G today, after wanting something like this for nearly 30 years. (I don't know if you others remember them, but there was a company called "Air Rifle Headquarters" about 30 years ago that had lots of great stuff that I could never afford.)
When you take it out of the box, it has to have a "barrel weight" installed - the front sight is on the weight, so it's required. There's an O ring that has to go into the weight, then you slide the weight over the barrel (the muzzle goes against the O ring). You push the weight against the muzzle to line up some screw holes, then put screws in the holes.
I found that there seems to be no reasonable way to line up the screw holes. With this O ring in place, I can push with all my strength to barely get the holes lined up (then of course I can't put the screws in because I only have two hands). Given the force that I need to exert to line up the holes, it seems to me that the little screws might shear off if I got someone else to put them in & then released the pressure.
But if you take the O ring out, it goes together fine. It seems to me that the only purpose for the O ring is to maintain pressure between the pieces (so that the sight does not wiggle). But it seems a tight enough fit without the O ring.
Does anyone out there have some more knowledge or experience with this? Any suggestions or thoughts?
Thanks,
John