rich,

 your best bet is to thread the bbl. of the misr 14mm x 1mm left hand for the correct/authentic slant compensator...if you have enogh meat to do so (the bbl. must be .55 diameter in order to achieve full thread contour).

you can also buy other styles of brakes and comps that fit this same threading.

after installation of the muzzle device you must, of course, 180° circumferential weld, 1100° silver solder or blind pin the device onto the bbl. for a permenant, legal installtion.

if you do not thread the bbl., there is a variety of pin-on, set screw attach and press fit in place muzzle devices on the market.

look in the tacked posts in the build it yourself forum for cross-fitting a euro ak-74 style threaded sightbase to your akm...just look up the diameter of your bbl. (euro pattern 7.62 akm) under the front sight base and compare it to the bulgarian bbl. diameter to see if the bulgy fsb will interchange.