I believe you are asking about the Remington AM77. It is rated at 725 FPS.
See the link below for the diagram of the Crosman pro 77.
755 fps
Well I am not sure about all the models but my Remington Airmaster 77 says it was manufactured by Crosman. ( Crosman is in New York) It doesn't say anything about China anywhere on the box or the rifle. Crosman owns Benjamin, Sheridan and is licensed to manufacture Remington air rifles.
77 days is 11 weeks
77 inches = 195.58 centimeters
They are both basically the same model only they appear to look different, but inside they are the exact same rifle. They even use the same parts manual.
0.0349
77 centimeters is 2 feet 6.32 inches.
77% of 360 degrees is 277.2 degrees.
77%
If you are asking about the Remington Air Master 77. Then see the attached Web Page. It was made by Crosman Air gun. New in 2006 See the Link Below
77.11 kg = 170 (169.99845) pounds.