Continuing to expand the ZION family of rifles at IWI US this 18a ^2 Special Purpose Rifle (SPR) pays tribute to the MK12 with a modern day update which includes a 17a ^2 Free Float Handguard with integrated ARCA Rail steel barrel nut a B5 Systems Stock and Grip IWI 2-Stage Precision Match Trigger and includes one (1) 30 round Magpul PMAG. Proudly manufactured and assembled at the IWI US facility here in the United States.Features: Caliber: 5.56 NATO Action: Semi-Auto Operating System: Direct Impingement Magazine Type: Polymer NATO STANAG Magazine Capacity: 30 Round Barrel Material: 4150 Chrome Moly Vanadium HB Barrel Length: 18? Overall Length: 31.5" Stock Collapsed 34.75" Stock Extended Weight: 7.6 lbs Rifling: 5R RH Grooves 1:8 Twist Stock Type: Adjustable B5