Extra items are included - SIG SAUER Sig MCX Upper Receiver Assemebly, M-LOK

Firstly, love them or hate them, it’s a nice Sig. There seems to be some confusion on how this conversion kit works, as well as exactly which items are included in this kit. This kit does include all the items required to make this work on a standard mil-spec AR lower. 1st is the adapter to replace the receiver extension / buffer tube, next is a folding pic 1913 adapter that attaches a standard buffer tube for use with a brace or NFA lower with a stock. The kit also included Sig BUIS, a 1913 QD socket for your rail, a TORX hex wrench, and what appears to be a tapered washer for changing the Sig flash suppressor to a standard one. Lastly, there is a Sig duo two-stage target trigger. Everything I have read about these Sig MCX suggests that either a Sig factory OEM trigger or an aftermarket Sig compatible trigger must be used with this conversion. I have only unboxed the kit, so until I get out to the range, I can’t comment on how the kit performs.