The UHP15PDW Lower receiver features the Integration of a Patented Monolithic adjustable PDW type stock system. The UHP15PDW lower also includes the Ambi Bolt release & Ambi Mag Release Lever similiar to the UHP15A lower receiver. The Ambi Mag release Lever is designed to work in conjunction with the Standard Mil-Spec Mag catch arm without the requirement of proprietary components for proper function. This mag release lever design provides the user field repair options of the mag catch typically not found with most ambi mag release systems that utilize proprietary mag catch arms. The Ambi Mag Release features a raised fence on 3 sides to protect the mag release from accidental actuation during weapon use. The Bolt release Lever & Mag Release Lever feature aggressive Texturing to ensure proper finger placement & grip during actuation. The ambi bolt release, ambi mag release & buttstock adjustment rods are Black Nitrided for corrosion protection. The Integration of the stock rod system with the lower receiver creates a stonger continuous PDW platform & also allows for the addition of a cheek weld that extends with the buttstock not currently found with most bolt on PDW stocks due to the bolt on housing design that extends rearward over the buffertube.