Daewoo Precision Industries K2 - K1 Carbine and K2 Rifle

K1 Carbine and K2 Rifle

While the K1/K1A carbine is commonly regarded as a carbine version of the K2, the K1 a separate carbine altogether, as:

• The K1 was developed earlier than the K2.
• The K1 uses direct impingement gas system, while the K2 uses a long stroke gas piston system.
• The K1 has a 1-in-12 rifling twist for KM193 (5.56 mm) rounds, while the K2 has a 1-in-7.3 rifling twist for both the KM193 (5.56 mm) rounds and the K100 (5.56 mm) green tip, full metal jacket rounds.
• The K1 was originally developed as a sub-machine gun, not as an assault carbine.