Amazon.com: TASKQWIK Toy Gun Attachments for Nerf Guns, DIY Nerf Blaster Upgrade Accessories Kits Compatible with Nerf Modify N-Strike Elite and Modulus and More, Toy Gifts for Nerf Fans (Stealth Set) :
Nerf Rail Masterkey Attachment Toy Parts - Etsy
WORKER F10555 NO.217 Mod Kit for Nerf Hammershot attachments Bayonet S – JGCWorker