Rifle and parts builders JMac Customs and M13 Industries have joined forces to introduce a new line of AK firearms.Designated as the OSC-13 series (Optics, Suppressor and Competition ready), the new rifles are available in three models with a variety of options.Pricing starts at $1250 for a basic build up to $2600 for one with all the options.JMac Customs has also developed a version of their popular muzzle brake with a Dead Air Silencers Sandman attachment system.