Marushin has gone super size with their M29 revolver with one of the longest pistols in Airsoft with 8 3/8 Inches barrel making it an overall length of 14.5 Inches / 37cm.
it runs on the X Cartridge system utilizing dummy shells that carry a single 6mm BB each and load just like a revolver with the BBs shot out at around 240 FPS on HFC134a / Duster gas. The long barrel and quality hop up ensure a nice consistent and accurate shooting pistol.
If you do not have spare shells, do be sure to pick up some (MRS-SHELL-629X) and although it is hard to find there is also a top rail scope mount for the M29 (TK-ACC-M29SMB).
This pistol is available in black and silver and with 4, 6.5 and 8 3/8 Inch barrel lengths.