From CZ USA: The kit includes the stock, a handguard, receiver side rails, disconnector and operating rod sub assembly. Looking at the photos it appears the handguard is different from the stock Bren 2 MS handguard, it even appears to have more M Lok slots. Additionally the 7.62x39 version will require US made magazines (Whether they mean an entirely US made magazine or followers/base plates I am unsure of) and a muzzle device.