Are you sure the ends are pushed past the o-rings and not just sitting in the collars? That would explain the extra length.
So my group is doing a 24 hour game stream this coming weekend as a benefit/fundraiser for Toys for Tots. I've got 2 time slots:
You would just need to remove the swing arm (clevis) from the sear. Then you just bolt on. You may have to re align the cheater but it worked perfectly