Here is a look at my CZ 511 .22 Rifle manufactured by Česká Zbrojovka of Czechoslovakia.
This is a blow-back operated semi-automatic rifle chambered for the .22 Long Rifle round. The rifle is equipped with an eight shot detachable box magazine. The barrel is 22" long (560mm) and is fitted with a two position rear sight for 50 & 100 meters as well as an adjustable front sight. The receiver has an 11mm dovetail for fitting a scope. The rifle weighs about 6 lbs 10 oz (3 Kg) with the scope, mounts and sling shown.
I have fired many thousands of rounds in this rifle and have found it to be reliable and accurate. Regrettably it is no longer in production.