Remington.
The Nylon 66 is a rifle that was made by Remington from 1959 to 1989. The brown and chrome model was Nylon 66MB and over 700,000 were produced.
Go to Remington's web site. They have a list of repair centers.
You can but the receiver flexes and it is difficult for the scope to stay in adjustment.
Check the service and parts link on the Remington Society of America here: http://remingtonsociety.com/rsa/service
If I recall correctly, 14 and it loads from the stock. This is long rifle ammo.
The Remington Model 66 is chambered for the .22 long rifle cartridge. The most common twist rate for the .22 long rifle is one full turn in sixteen inches (1:16).
Any brand of firearms cleaning solvent will do the job.
I can say that the A prefix was added to the serial number in 1977.The last nylon 66 rifles were made in 1987.So your rifle dates from 1977-1987.
No
Yes, Remington made a "Apache" model of the Nylon 66 .22 caliber rifle. It had a black nylon stock with a chrome plated barrel & receiver. It was a very nice looking rifle.
What is it doing that you think is a problem? This is a gun with a long and successful run.