VZ 58 / CZ 858   22mm AK STYLE SLANT BRAKE. This brake will allow attachment of AR-15 Style Bayonets (Adaptor not Included). This brakes future expended slant portion to work well with Longer Canadian 18.5 inch barrel. This brakes are "Blanks" no internal threading diameter is 13mm good for any 14mm thread 

Made in Czechoslovakia