The stock needs to be pinned to prevent it from folding and collapsing, and then a muzzle brake it comes with needs to be permanently pinned. If I can’t find one in a couple weeks, I may build another .308 AR but would highly prefer the SCAR.
My biggest gripe with the SCAR is that the 17S takes proprietary mags, so I can’t use anything from an AR-10, LR-308, FAL, G3, etc… And the mags are hard to come by for the SCAR.