K26 Spring 11" with square ends (BETTER than McMaster) – Out of Darts
K25 Spring with squared ends (BETTER than McMaster) – Out of Darts
Main Power Spring – Frontline Foam
The NIC Spring Database - General Nerf - NerfHaven
For the rival knockout, you can change spring by drilling a hole at the top, then unscrew like a longshot plunger head. Bad news, spring dimensions are quite specific. Kronos 18kg from
Amazon.com: NERF Hyper Evolve-100 Blaster, 70 Hyper Rounds, Spring-Open Instant Reload Hopper, Up to 110 FPS Velocity, Eyewear Included : Toys & Games
Worker 12 kg Spring for Nerf Retaliator - Blaster-Time
Blaster Mod Upgrade Spring for Nerf Modulus Longstrike Blaster - BlasterMOD
Amazon.com: Nerf Pro Gelfire Legion Spring Action Blaster, 5000 Rounds, 130 Hopper, Protective Eyewear, Slam Fire, Ages 14 & Up : Toys & Games
Amazon.com: Nerf Hyper Impulse-40 Blaster, 30 Nerf Hyper Rounds, Spring-Open Instant Reload Hopper, Up to 110 FPS Velocity, Eyewear Included : Toys & Games
Amazon.com: WORKER 18KG Upgrade Spring Silver for NERF Rival Jupiter XIX-1000 : Toys & Games
Amazon.com: WORKER 14KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) : Toys & Games
K26 Spring 11" with square ends (BETTER than McMaster) – Out of Darts
Blasterparts - Modification spring for NERF Maverick REV-6 - blasterparts.com
Foam Focus K26 Universal Spring full length (28 cm) - Blaster-Time
Rival Vision Spring (135+ FPS) – Out of Darts
Amazon.com: WORKER 18KG Upgrade Spring Silver for Nerf Rival Kronos (XVIII-500) : Toys & Games
K25 Spring with squared ends (BETTER than McMaster) – Out of Darts
Worker 7 kg Spring Upgrade Kit for Nerf Rampage - Blaster-Time
Worker 5kg Spring Upgrade Kit for Nerf Slingfire - Blaster-Time
Blasterparts Upgrade Spring for Nerf N-Strike Longstrike CS-6 - Blaster-Time
Worker 12 kg Spring for Nerf Retaliator - Blaster-Time
Guide to Springs for Nerf Springer Blasters - YouTube
10KG Upgrade Spring for Nerf N-Strike Mega BigShock Blaster Toy | Worker Nerf Mods - Workermod.com
Ultimate Guide to Springs for Springer Blasters – Frontline Foam
