SIG M400 TREAD BE WARNED

So far this thing is quite the muzzel device. Just be warned if you own a SIG tread this will not fit out of the box. This is SIG's fault for making the end of the barrel right before the threads start tapered. It requires a tapered cup sold from SIG in order to mount this on the rifle. As far as I could tell all the MPX and fancier SIG rifles come with this tapered cup in the box but the Tread searies of rifles to not. This part is actually pretty hard to find as SIG is always out of stock and not many people sell it. It may not be possible but if Priamry arms would sell it I would have ordered it through them but only could find it else where. Other than that the JCOMP works and looks fantastic.