This prop comes as a raw, unassembled print in 31 pieces (and 2 magnets).
The dynamic sliding mag component is held in place with magnets. When first assembled, the prop's dynamics will be stiff as tolerances are high; over time with use, the sliding action will become easier to achieve and the dynamics will smooth out.
Each of these blaster props is a raw print, and will require cleanup, priming, and painting to make a finished prop. I print these in PLA+.
I use Starbond CA glue to put them together and it is much tougher than superglue. Total length when assembled is about 13.5 inches.
I have added an orange safety cap. The safety cap comes printed in orange filament; it is NOT meant to be pressed all the way into the barrel; leave a gap as shown in the pictures so you can get it off again. Both cap and flash hider are designed to insert and remove from the barrel with friction fit.
THIS IS A PROP.
Assembly video can be found here: