Dirty Bird Bakersfield
Only 1 left in stock
Description
Ensure reliable muzzle device retention on your Krinkov or CR-type AK front sight blocks with the precision-engineered MSR Spring for Plunger Pin. Designed specifically for UR/SFK (Krinkov) and CR 18mm configurations, this compact replacement spring maintains consistent tension on the plunger pin, delivering secure lockup for gas tubes, handguards, and muzzle accessories.
Key Features
- Exact OEM-spec dimensions for 18mm plunger pin setups in triangular milled-receiver front sight bases
- High-tensile spring steel construction for long-term durability and resistance to fatigue
- Provides consistent detent pressure to prevent loosening during recoil or transport
- Direct fit for UR/SFK Krinkov and CR-type front sight blocks without modification
Benefits for AK Builders and Maintainers
A worn or weakened plunger spring can cause muzzle devices to shift or loosen, compromising accuracy and safety. This MSR spring restores factory-level performance, ensuring your front sight block assembly stays locked in place shot after shot. Its minimal size and weight make it an essential spare for any serious AK enthusiast or armorer.
Specifications
- Compatibility: UR/SFK (Krinkov) and CR-type 18mm front sight blocks
- Material: High-quality spring steel
- Length: 0.7 in
- Width: 0.12 in
- Height: 0.12 in
- Weight: 0.01
Why Choose This Product
Whether you’re rebuilding a classic milled AK or maintaining a Krinkov variant, this spring delivers the precise fit and reliable function needed for professional-grade results. Keep your front sight block operating at peak performance with this essential component.
Additional information
| Weight | 0.01 oz |
|---|---|
| Dimensions | 0.7 × 0.12 × 0.12 in |
| MPN | KR-333S |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
