Worker 7 kg Spring Upgrade Kit for Nerf Rampage - Blaster-Time
Modification Spring for NERF N-Strike Longshot – Containment Crew
Slaedur Nerf Mods - GU Recon is coming along nicely! All mods are reversible. Hitting in the 200 FPS range. Running: 25n prophecy spring, Worker XPT with orange short dart kit into
10KG Upgrade Spring for Nerf Modulus Recon MKII Blaster Toy - Etsy
Amazon.com: WORKER Upgrade Mod Kit for Nerf Ultra Pharaoh Modify Toy (Spring) : Toys & Games