Amazon.com: Worker Mod 27.9CM Picatinny Top Rail Mount for NERF ELITE STRYFE BLASTER by WORKER : Toys & Games
Nerf Rival Rail to Picatinny Rail Adapter (3 Slots (X2VGDRSFA) by Blasters3D
1 Pcs Modified Part Front Tube Decoration with Upper and Lower Guide Rail for Nerf Elite Series Orange Grey For Nerf Toy Gun Mod|Paintball Accessories| - AliExpress