During the late 1950s, theBulgarian People's Army was equipped withAK-47s imported from the Soviet Union. However, by the early 1960s, the Bulgarian government became interested in producing the AK assault rifle domestically.[4] Assembly of AKs, initially from imported Soviet parts, began at theArsenal AD state arsenal inKazanlak.[4] By the mid 1960s, the Kazanlak facility was equipped to begin licensed production of the weapon type and its associated parts. Kalashnikov rifles assembled and later manufactured in Kazanlak received the designationAKK.[4] A derivative with a folding stock was also produced under license as theAKKS.[4]
After the dissolution of thePeople's Republic of Bulgaria in the early 1990s, the Kazanlak factory became ajoint-stock company known asArsenal AD.[4] Arsenal offered several modernized variants of the AKK for export, which were rebranded as theAR series.[4] TheAR pattern rifles are AKKs with different furniture and a few unique features, such as polymer stocks and handguards, as well as several external parts copied directly from theAK-74 including new flash hiders, sights, gas blocks, bayonet mountings and bayonets.[4] AR-M1 receivers are milled, rather than stamped (unlike theAKM), and are virtually indistinguishable from those of the early pattern Soviet AKs.[4]
A derivative of the AKKS is also offered for export as theARF.[4]
AR-M2 / AR-M2F - improved AK-74 copy like the AR-M1/AR-M1F, but with a shortened barrel,AKS-74U front sight base andmuzzle booster/flash suppressor hybrid.
AR-M4SF - extremely short development of the AR-M1 withred dot sight, provision to mount anightvision orlaser sight. Chambered in 5.56×45mm NATO[6] and 7.62×39mm.
AR-M7F - like the AR-M1, but with anAK-101-style folding stock.
AR-M9 / AR-M9F - improved AK-74 copy like the AR-M1/AR-M1F, features a thumb-operablefire selector and a different style polymer stock set.[7]
AR / AR-F - improvedAK-47 copies with black polymer lining and optional luminous sights.[8][9][10][11]
^abcdefghijBrayley, Martin (June 1, 2013).Kalashnikov AK47 Series: The 7.62 x 39mm Assault Rifle in Detail. Marlborough: The Crowood Press. pp. 45–59.ISBN978-1847974839.