HK to AR15 Stock Adaptor

HK to AR15 Stock Adaptor HK to AR15 Stock Adaptor Made from aircraft-grade aluminum Black hard coat anodized Accepts AR15 collapsible Stocks Weight - 6.14oz Drop-in design Compatible with: HK91, G3, PTR91, PTR-PDW HK93 HK to AR15 Stock Adaptor. Aircraft grade aluminum and black hardcoat anodized with a weight of just 6.14oz this adaptor will allow you to add an AR15 style buffer tube to your HK91, PTR91, PTR-PDW or HK93.