Amazon.com: WORKER No.114 MP5-A Front Tube Kit for Nerf Stryfe (Black) : Toys & Games
Worker PDW-Style Front Barrel for Retaliator – Out of Darts
Nexus Pro with 3d printed parts. Air sealed, worker barrel, metal prime bar and adjustable scar muzzle. Worker 1.8 spring hitting around 210 - 220fps. : r/Nerf