HECKLER AND KOCH (HK USA) MR556A4 UPPER KIT 5.56MM 11″

Heckler & Koch accessories represent decades of engineering refinement for shooters who demand precision and reliability. Whether you're optimizing your setup for sport shooting, building out a competition platform, or upgrading core components, quality H&K gear integrates seamlessly with proven systems. TacticCAL serves Bay Area shooters across Fremont, Cupertino, and beyond—we stock H&K accessories and handle California FFL transfers at our Sunnyvale location. Reach out to confirm compatibility with your platform or explore our full selection in person.

TacticCAL Gun Store Sunnyvale CA — your Bay Area firearms dealer for parts and accessories. FFL transfer Sunnyvale CA and gun shop Sunnyvale CA service for Cupertino and South Bay shooters.