HK G3/33 Buffer Tube Adapter

HK G3/33 Buffer Tube Adapter HK G3/33 Buffer Tube Adapter For G3/ 33 Series Type Rifles and Pistols Compatible W/ AR15/M16 Buffer Tubes HK G3/33 Buffer Tube Adapter. This adapter lets you attach an AR-15 buffer tube to your HK G3 or 33-series rifle, pistol, or SBR. Compatible with commercial, mil-spec, and pistol AR-15/M16/M4 buffer tubes, it allows you to run AR-style stocks or braces (NFA rules apply). Use it with your existing metal backplate and standard G3 buffer—no need for extra parts. Ideal for custom HK builds where you want AR-15 stock options. Compatible with HK91, G3, PTR91, PTR-PDW MKE AP51 HK 93, 33, 53 MKE AP53. Will not work with MP5.