The Silverback Desert Tech SRS rifle spring is a first-party part designed to be a drop-in upgrade for the rifle to help improve the performance of the gun.  

Compatibility: 

• Silverback Desert Tech SRS A1 
• Silverback Desert Tech SRS A2 

Spring Type: 

• M130 

Includes: 

• x1 Silverback M130 APS 13mm Type Spring for SRS Pull Bolt Version