https://thecastlearms.com/product/sig-sauer-mpx-pcc-9mm-luger-16-301-black-hard-coat-anodized-5-position-folding-stock#product_detail

The MPX has been a leader in the PCC category for years, with its superior performance and reliability. The PCC competition ready platform that gives you the same reliability with the ultimate in performance. It features a Timney MPX trigger, slim M-LOK handguard, folding telescoping stock, and a 3 chamber recoil reducing compensator. MPX PCC is built to perform at the highest level with zero modifications and give you the reliability you have grown to expect from the MPX.