MR556 Lock Bolt Pin is a small bolt-system component associated with the HK MR556 family and identified by SKU 50979290. This page provides educational identification and compatibility guidance without installation instructions.
MR556 Lock Bolt Pin specifications
- SKU: 50979290
- Component type: Lock bolt pin
- Referenced model family: HK MR556
- Category: Upper Receiver Parts
For catalog context, consult the official HK Upper Receiver Parts catalog.
MR556 compatibility and related bolt components
Compatibility depends on the exact bolt assembly, model variation, production configuration, dimensions, and verified part number. Do not treat similar-looking pins as interchangeable.
Related references include the MR556 Bolthead Carrier Incomplete, MR556 Firing Pin, Upper Receiver Parts, and Rifle Parts.
Identification considerations
Use SKU 50979290, the complete model designation, dimensions, and manufacturer diagrams. Small differences may affect retention or safe function.
Safety and professional service
Bolt-system components affect locking, firing, and cycling. Keep the firearm unloaded and ammunition separated. A qualified gunsmith should assess identity, condition, compatibility, installation, and function using manufacturer procedures.
Common MR556 Lock Bolt Pin questions
Is it a universal receiver pin?
No. This listing is a model-specific bolt-system reference.
Does its small size reduce the need for verification?
No. Exact identification remains important for safe retention and function.
Reviews
There are no reviews yet.