Aim7 ZIRCON HK & PTR AR Adapter
AR15 to HK 90 series Stock adaptor for AR15 stocks that includes the commercial buffer tube and castle nut to use any MILSPEC AR15/M16 stock of your choice on your HK rifle or SBR build. With the adapter, you can use your existing metal backplate, standard G3 buffer, and your choice of stock to add an AR15 stock to your HK firearm.
This is a perfect complement for those who want to use an AR-15 stock on their HK rifle or SBR.
Fits any HK firearm that uses a metal backplate such as the HK91, G3, PTR91, PTR-PDW, HK 93,33, 53, etc. Each adopter includes the proprietary locking ring, buffer tube, and castle nut installed and ready to drop on your MILSPEC sizes AR stock.
Made from aircraft-grade aluminum and comes in a black hard coat anodized finish ready to install.