S length. Absolutely sure you would like some force, but this is because of The truth that the short change buckle is held in position by friction. This may very well be the weak point to a person but I have discovered this for being of no issues for me, https://bulldogbeltslideholsterbl64185.diowebhost.com/89639417/5-simple-statements-about-full-rail-1-7-twist-explained