Ensure reliable operation and maintain the performance of your Arsenal Bulgaria milled receiver AK with the MSR Collar Retainer for Recoil Spring Assembly. This precision-engineered component is specifically designed for telescoping-type recoil systems, providing secure retention of the recoil spring to deliver consistent function during high-volume shooting or demanding tactical use.
Key Features
- OEM-spec design from Arsenal Bulgaria for exact fitment on milled receivers with telescoping recoil guide rods
- Constructed from durable steel for long-term resistance to wear, corrosion, and repeated cycling
- Compact profile minimizes added weight while ensuring positive spring retention under recoil forces
- Direct replacement part engineered to restore or maintain factory-level reliability in SAM-series and compatible milled AK platforms
Technical Specifications
- Compatibility: Milled receiver, telescoping-type recoil spring assemblies (7.62x39mm and 5.56x45mm calibers)
- Weight: 0.03 lbs
- Dimensions: 0.55″ L x 0.35″ W x 0.35″ H
- Material: High-strength steel
Why Choose This Product
Loose or worn recoil components can lead to inconsistent cycling, spring binding, or premature wear on your rifle. This collar retainer addresses those issues by securely holding the recoil spring in place on the telescoping guide rod, promoting smooth operation and extending service life. As a genuine Arsenal Bulgaria-sourced part, it guarantees compatibility without modification, making it the ideal choice for maintaining authenticity and performance in your firearm.
Whether you’re performing routine maintenance, replacing a damaged component, or building a custom setup, this retainer delivers the precision and durability serious shooters demand.

