Description
MP5SD 120 Degree Locking Piece – US This locking piece is a US made version of the factory German MP5SD 120 degree locking piece. This was the German locking piece that was marked #5 when HK Germany used to make them. Each locking piece is made here in the USA with ordnance grade steel, heat treated and made to last. No finer US made locking piece exists.
Compatibility & Fitment
- HK MP5SD models that need additional cycling support with anemic ammunition
- Custom builds or clones
What’s Included
- One HK MP5SD Locking Piece #5 – 120 Degree – 9mm
Specifications
- SKU: HKP-16715
- MPN: RCM-GP-LP130
- Brand / Manufacturer: RCM
- Locking piece angle: 120 Degree
- Material / treatment: Ordnance-grade steel; heat treated, per production source.
Installation Notes
- Production source describes this as the US-made version of the factory German MP5SD 120-degree locking piece formerly marked #5.
- 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.
