Description
Product Description
The Haga Defense 1913 Stock Block is for HK USC upper receivers used with HK UMP lowers providing a Picatinny (1913) interface for mounting compatible stocks or braces. Machined from 6061 aluminum with Mil-A-8625 Type III Class 2 hardcoat anodized black finish, this adapter reuses factory mounting screws and buffer for a solid, clean installation.
Specifications
- Material: 6061 aluminum
- Finish: Mil-A-8625 Type III Class 2 hardcoat anodize, black
- Rail: Picatinny (1913)
- Mounting: Reuses factory mounting screws and buffer
- Included: 1913 stock block
- Made in: USA
Compatibility and Installation Notes
- Compatible with HK USC upper receivers used with HK UMP lowers
- Reuses factory mounting screws and buffer
- No permanent modifications required
Legal NoteAlways ensure your firearm configuration complies with all applicable federal, state, and local laws.









