PTR91/HK91 Clone – Part 2: Modularity & Some Accuracy Upgrades https://www.americanpartisan.org/2022/05/ptr91-hk91-clone-part-2-modularity-and-some-accuracy-upgrades/ Part 1: https://www.americanpartisan.org/2022/04/evaluating-the-ptr-91-hk-91-clone-as-a-survivalist-rifle-and-accessorizing-it/
