M4 Airsoft RAS Keymod Rail

thingiverse

After playing a few games with my M4 AEG, I discovered that the plastic handguards just weren't sturdy enough and looked a bit too stock.\nI took my M4 apart, studied the Delta ring and gas tube connection, and after measuring and searching Google for reference images, came up with this 10" RAS Keymod Rail.\nThe rail attaches directly to the threads on the upper receiver and simply screws tight. It can be held in place with the gas tube or used with a rail riser or optic as I have done in the pictures to keep slight pressure on the rail without it unscrewing, which it already is fairly tight.\nThis rail is actually free floating, but I designed a mounted suppressor that screws over the outer barrel extension to give extra strength to the rail and secure the inner barrel.\nThe suppressor has standard 14mm CCW threads.\nTo add rail segments, consider my keymod rail segments design.\nDon't have a printer? Contact me on my Etsy store and I'll be happy to print it for you: https://www.etsy.com/shop/XDr4g0nX3DPrinting\nPrint Settings:\nPrinter: Gemstock - Azurite\nRafts: Yes\nSupports: No\nResolution: 0.15mm\nInfill: 35%\nNotes: Make sure to print it in a sturdy filament like PLA or ABS, as others might not hold up to the weight of the rifle and sag/bend.\nAlso ensure your cooling and retraction settings are properly dialed in.\nPost-Printing:\nMounting the rail\nDisassemble your current rail/handguard so that only your receiver and outer barrel remain.\nScrew the rail onto the threads of the receiver while slightly unscrewing to loosen the threads of the rail a little.\nOnce in place, mount the gas tube or optic to secure the rail.\nFinally, mount the suppressor onto the outer barrel and into the rail by simply screwing it on.\n\nUpdate\nI have also uploaded a 7" and a 12" version alongside the original 10", for those with CQB length airsoft replicas and for those with rifle-length barrels.\nUpdate 2\nI made a 4" version at Phreqq's special request, designed for those who don't need their barrel to compensate anything. I also modified the threading section based on simonvez's suggestion that some barrel types didn't fit well in my original design, changing the barrel opening to 24mm as recommended.