CALIBER
4.5mm Steel BB
ACTION
Double Action Non-Blowback
VELOCITY
380 FPS
MATERIAL
Full Metal
The M6504 is a CO2 non-blowback (NBB) pistol with a fixed slide. It is specified as Double Action Non-Blowback in 4.5mm Steel BB, with Full Metal construction. Muzzle velocity is 380 FPS.
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