Selling a Silverback Airsoft SRS upgrade bundle, ideal for tuning and dialing in your sniper setup. Bundle Includes: • Silverback Airsoft SRS Type Spring – 95 Newton (new, sealed) • Silverback Airsoft FAST Field Adjustment Hop-Up Set • Compatible with Silverback SRS / HTI • Allows quick hop-up adjustment without full disassembly Both items are brand new and unused. Great combo for anyone upgrading or fine-tuning a Silverback sniper rifle.