Another thing to do instead of a barrel band, and holds the barrel more snug than stock, is replacing every o-ring in the barrel system, including those on the outside that hold the barrel rigid withing the frame, with a harder compound urethane o-rings. From the factory they are a soft and standard rubber Buna 70. Install a hard urethane buna 90 everywhere. The harder compound o-rings don't deflect the barrel as much and distort with pressures of a foam gun case or leaning it against the wall of the safe.