The model is designed to be easy to print and fit most printers out there (for smaller printers such as Prusas or Ultimakers there is an additional folder with a split version of some of the pieces that wouldnt otherwise fit in the built plates). It is about 160cm long and designed to be reinforced with aluminium rods (main barrel rod 20mm by 75cm / lower thin rod 12mm by 110cm going through most of the structure). The printed out product will be strong and just heavy enough to feel great and not toy-like in your hands, however, if you wish to have it fully 3D printed without metal rods i have included cylindrical pins that slide into the slots to ease assembly and improve durability anyway. The forked tip, being the most vulerable part, is attached to the the end of the barrel with a rotary snap mechanism making it safe to remove for transport or easy to replace in case it breaks without compromising the rifle. (details in the pictures). The end of the barrel comes with a round replacement if you don't like the hexagonal part. (i've seen both versions used) If you have any questions, feel free to message me! enjoy!