I made a swordfish top rail modification for a airsoft MP5. Remove the end cap, front sight along with flash hider, front sling mount pin and back sight to attach this modification. I printed it in ABS. The Mp5SwordfishA file is the front and comes in a smooth version that doesn't have the fake screw heads and texture on the front. I had to split up the rest of it due to my printer not being big enough to print the B C and D sections but included a joined version if someone has a printer that can do it. I super glued the B C and D sections together. Do not glue the front head A section, It's meant to be able to separate from the rest of the sections and lines up with a tab to section B. Print with supports enabled, my print settings were 230 C, 10% infill, 2 shells and 0.3 mm. I haven't test printed the smooth version or the joined version. Section C can be used as a low profile rail mount.