The 9KT PTR 603 is a well engineered clone of the H&K SP5K sub gun.  This one comes with the SBT5Ka folding arm brace.  The 9KT model features an M-LOK compatible aluminum handguard with attached finger guard. The nitride treated 5.16”, 3-lug barrel is threaded to 1/2 x 28. Both a push button and paddle magazine release are standard. The 2.55” precision-welded top rail enables use of compact optics or the traditional iron sights (included). The aluminum end cap features a removable QD sling mount with attachable M1913 rail, stock adapter. The gun ships in a heavy duty range case with: single point bungee sling, two 30-round magazines and rear sight adjustment tool.  The original HK MP5 mags with the HK Coupler are not included with the package but are available for sale.