it sounds like you have a bulgarian sa-95 (built by arsenal kazanlak, aka "code 10"...the state arsenal).

if you wish to retrofit the military furniture (which is ak-100 series, btw), k-var is definitely the place to go.

you can order a matching usa made buttstock and pistol grip, along with the lower receiver tang that you need to install prior to fitting your new buttstock.

remember to add the required number of usa made parts to make you legal...4 without a muzzle attachment, 5 if you have one.

the buttstock and pistolgrip count as two parts. replacement usa handguards that match yours perfectly are also available in a furniture 'set' for your rifle. both handguards count as one usa part.

using usa made mag floor plates or followers may will you another one or two parts. a redstararms trigger group would add 3 parts...etc.