These Ejector Shell... Shells are simple 3D-printed shells for the X-Shot Excel Ejector Shell shell-ejecting bolt-action blaster. Featuring geometry similar to the included shells, these exclude the dart post, making them both rear-loadable and compatible with short darts without sacrificing performance. Additionally, these shells have a tighter inner diameter, allowing them to reach 120+ FPS with an upgraded spring. FEATURES:• Ejector Shell Shells• 3D-printed shells for the new shell-ejecting blaster• Rear-loadable • No dart post!• Capable of 120+ FPS with spring upgrade• Compatible with the X-Shot Excel Ejector Shell• Compatible with both full-length and short darts INCLUDES:• 10 12.9mm ID Shells PERFORMANCE:Average FPS (Standard Deviation) with Worker Full-Length Darts• 75 (3) FPS with the stock 1.4 x 120mm spring• 84 (5) FPS with a 1.7 x 110mm spring + 10mm spacer• 89 (6) FPS with a 1.8 x 120mm spring Average FPS (Standard Deviation) with Worker HE 1.0g Short Darts• 94 (2) FPS with the stock 1.4 x 120mm spring• 112 (2) FPS with a 1.7 x 110mm spring + 10mm spacer • 115 (4) FPS with a 1.8 x 120mm spring SPECS:• Material: 3D-printed PLA Plastic• Dimensions: 13.5mm x 60mm• Weight: 5.6g each• SKU: 3D LUK XSH EJECTOR SHELLS LINKS:• 3D Files• Ejector Shell Springs• More Ejector Shell Mods + Accessories