English make.
At Numrich gun parts : it is the same as a Squires Bingham 1600
A rifle.
remove the lage pin from the rciever and rock the tigger pack up and towads the muzzle of the gun and it should lver right out, from there it is pre self explanaory
A gunsmith can assist you.
No
Ebay
September 1980
No
about $200 new $150 typical
it looks exactly like a vietnam era m16 in .22 caliber
Made in the Philippines
Nowhere that I know of.