M66 (Model 66) is an US made revolver which is a variant of the famous M19 Revovler, first produced in 1970. M66 chambered the same cartridge (.357 Magnum) of M19, but M66 was produced by stainless steel which M19 was produced in blued carbon steel or nickel-plated steel. M66 was discontinued in 2005 after produced for more than 30 years.

Features :
Plastic Body frame, barrel, cylinder and metal made chamber.
2.5 inch barrel.
Fixed Front and and adjustable rear sight.
Cylinder with 6 pcs of dummy bullet shells which cannot be ejected.
Total 24 rounds can be loaded in the Cylinder which 4 round in each dummy bullet shell (Tokyo Marui 24 SHOT System).
Fixed Hopup system.
Single-action or double-action fire mode.
Manual safety behind the trigger.
Comes with hand grip in black.
Gas chamber in hand grip.
8KG (134a) gas is recommended.

Specifications :
Length : 201mm
Barrel Length: 61mm
Shooting Mode : Safety, Semi-Auto
Power Source : 8KG (134A, recommended), 12KG (Green gas)
Weight (Gram): 510 (gun only), 860 (With Box)
Color : Silver
Magazine Capacity : 24 rounds
Materials : Plastic and metal
Bullet Type : 6mm BB
Manufacturer: Tokyo Marui