Ensure reliable operation of your side-folding stock with the MSR Catch pin retainer spring designed specifically for milled receivers. This precision-engineered component maintains proper tension on the front catch pin, preventing unwanted movement and ensuring consistent latching performance during deployment and storage.
Key Features
- Exact OEM fit for Arsenal and compatible milled receiver side-folding stock assemblies
- Constructed from durable spring steel for long-lasting tension and resistance to wear
- Compact dimensions (0.4″ L x 0.12″ W x 0.12″ H) allow seamless integration without adding bulk
- Lightweight design at just 0.005 units supports overall firearm balance
Benefits for Shooters
A worn or missing retainer spring can cause the catch pin to drift, leading to sloppy stock operation or failure to lock securely. This replacement spring restores factory-like function, delivering crisp deployment and secure retention whether the stock is folded or extended. Ideal for maintaining tactical readiness on AK-pattern rifles with milled receivers.
Specifications
- Position: Front catch pin retainer
- Compatibility: Side-folding stocks on milled receivers
- Material: High-quality spring steel
- Weight: 0.005
- Dimensions: 0.4″ length, 0.12″ width, 0.12″ height
Why Choose This Product
Small parts like retainer springs play a critical role in the reliability of folding mechanisms. This MSR component provides an affordable, direct replacement that addresses common wear issues without requiring modifications or additional tools for installation.
Keep your side-folding stock performing at its best—order your replacement spring today.

