Panther VTS has that... and is a damn fine gun.
Only issue you may have is finding barrels, they are a unique thread.
Bryan "Azzy" Spiegel Riverside Renegade Paintball / C.C. S.V.S. Plankowner - LPPC#6
"It is my right to be uncommon—if I can. I seek opportunity—not security. I do not wish to be a kept citizen, humbled and dulled by having the state look after me.... ” - Dean Alfange