I don't think the collar keeps the spring in place. I was told its only there to protect the wood forearms and isn't even used on synthetic forearms.
I would have to agree with Jim, buy one from Brownells( gas cylinder collar). Manuel stated gas cylinder collar not used on super magnum. Ihave a synthetic and it does use collar.
I use a CR speed as well for Limcat holster. The DAA belt I hear is great for CR speed holster and mag pouches, it takes out all side to side movement out. I would guess becouse of what you just stated, the belt is thicker!
I'm on Gunbuilder and have completed a 5" sight tracker and a 6" for limited, both in 40 S&W. I've read about the sight tracker being an advantage due to the front sight being attached to barrel. Then I read about how the 6" is softer to shoot.
If you own a SV sight tracker or a SV 6" weigh in your pros and cons or which one would you buy and why?