As a Nerfer, I looked at my Aeropress and thought "that's a big plunger".
With a few printed parts there is now a new plunger (with o-ring grooves), and a new modular place to put up to 6 elite sized darts.
Fancy a 6 shot blaster - no problem, single shot - ok. (actually with no AR 6 shot is likely to be problematic - but hey)
If there is interest Rival, Mega etc adaptors may follow (or feel free to remix).
Office warfare will never be the same again.
There are two dart cylinders with a tapered fit. A looser one (13mm to 14.2mm) and a tighter one (12.6mm to 14mm). Use whichever suits your plunger seal.
Do post pictures of your makes. It would be amazing to see who can get the highest FPS from this contraption.
I've managed about 40-50fps with the tighter barrel - sure it can do more with some proper length barrel material.