Worker 9kg Spring Upgrade Kit for LongShot - Blaster-Time
Nerf Longstrike Spring Mod Test / Full Gun Breakdown Conversion Elite darts - YouTube
Worker Mod 9KG Stefan Breech Bolt Plunger Kits for Nerf CS 6 LongStrike Toy|Toy Guns| - AliExpress
7KG Upgrade Spring for Nerf Modulus Longstrike Blaster Toy | Worker Nerf Mods - Workermod.com
WTS - Nerf Longstrike with stefan short dart kit + worker metal internals + upgraded spring : r/NerfExchange
Mod Works: Nerf Longstrike - Internals Guide!
WORKER 14KG 18KG Modification Upgraded Spring for Nerf LONGSTRIKE Children Toy Gun Supplies Spring Accessories Easy Installation|Toy Guns| - AliExpress
Nerf LONGSTRIKE Modded PAINTED Sniper Blue W/OMW 5kg SPRING No Restrictor KaPoW | #1886297735
Worker 22 kg Spring for Nerf Longshot - Blaster-Time
Nerf LONGSTRIKE MODIFIED & CUSTOM PAINTED Restrictors remove 5kg spring added ** | #1865836629
Nerf Modulus Longstrike 7KG Modification Upgrade Spring Coil | Etsy UK