ARP Battery Tube Extender

thingiverse

I designed this battery tube extender from scratch for my ARP airsoft replica using DesignSpark Mechanical. The extender does not "clip" to the main body, but the stock will secure it in place and you can clip the OEM battery cap onto the back. If you carefully tuck the wires in, you can fit a 3-stick 11.1v Lipo battery into the whole compartment. Be very careful not to pinch wires or dent the battery. NOTE: The stock will not collapse with the extender in place. Play around with printer settings, but I printed my prototypes with PLA at 210 degrees at 0.3mm layer height. 0.1 or 0.2 will be better, but will take hours. Print it with the bigger opening and stock "rings" at the bottom and the part you will insert at the top (so it looks almost like a space shuttle.) 100% - 50% infill should be fine and use a brim for added support. Support rafts shouldn't be necessary due to internal curves for PLA and ABS, but the two clips at the top might. NOTE: Due to the nature of my printer, a 2mm hole in real life is modelled as 3mm, as the PLA "squishes" out and will actually affect tolerances. I suggest printing just a portion of the model first to check that the fit is correct. Scale up or down by 1% as needed if you have a high quality printer. Mine expands the PLA slightly and some sanding is required. This is still somewhat a work in progress but I've used mine for a while with no issues.