Description
MP5K, SP89 Locking Piece – 110 Degree – RCM US-Made Locking Piece. Made from ordnance grade steel, heat treated, and made to last by RCM. HK no longer makes the 110-degree locking piece as they use the 100-degree locking piece in all 9mm MP5 and MP5K variants.
Compatibility & Fitment
- HK MP5K
- HK SP89
- MP5 Reverse Stretch
- MP5 Compact
- Custom HK builds and clones
What’s Included
- One HK MP5K, SP89 Locking Piece – 110 Degree – 9mm
Specifications
- SKU: HKP-01465
- MPN: RCM-GP-LP110
- Brand / Manufacturer: RCM
- Locking piece angle: 110 Degree
- Material / treatment: Ordnance-grade steel; heat treated, per production source.
Installation Notes
- Production source notes HK moved 9mm MP5 and MP5K variants to the 100-degree locking piece; confirm host-specific need before selecting the 110-degree part.
- Use qualified armorer support when changing locking-piece angle, suppressed configuration, or ammunition setup.
Important Warnings
Recommended Add-ons
Related Products
Related locking-piece products are connected through shared HK locking-piece, MP5, MP5K, MP5SD, and RCM taxonomy. Selection should be based on host platform, ammunition, suppressor use, and armorer guidance rather than degree alone.
