Nerf Retaliator (How To - Reassemble) - diYotamCh - YouTube
Elite 2.0 Echo tear down. Similar to Retaliator internals. Once you get past the solvent weld, comes apart easily. Will have dimensions of internals soon. : r/Nerf
Nerf Gun Reparatur - iFixit
Nerf N-Strike Elite Retaliator Case Disassembly - iFixit Repair Guide