Main Operating Loading Firing Adjustments Safety

Models RM277, RM3777, RM577 & RM777


Mechanical system Spring piston, single shot
Caliber/Ammunition RM277/RM377/RM577/RM777: .177 cal. (4.5 mm) Lead Airgun Pellet
RM522/RM622: .22 cal. (5.5 mm Lead Airgun Pellet)
Total length RM277/RM377: 39 in. (99.06 cm)
RM577/RM777: 45 in. (114.3 cm)
RM777: 48 in (119 cm)
Weight RM277/RM377: 7 lbs. 1 oz. (3.2 kg)
RM577/RM522/RM622: 7 lbs. 15 oz. (3.6 kg)
RM777: 8 lbs. 4 oz. (3.74 kg)
Muzzle velocity RM277/RM377/RM522/RM622: Up to 825 fps (251 m/s)
RM577: Up to 1000 fps (305 m/s)
RM777: Up to 1100 fps (335 m/s)
Function Break Barrel
Barrel Rifled Steel
Safety Automatic ambidextrous

Main Operating Loading Firing Adjustments Safety

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