This is a Short Barreled Rifle (SBR) version of the IWI ZION Z-15 rifle. ALL NFA RULES APPLY. (All Sales Are Final On NFA Items, No Returns) The first M4 Variant rifle from IWI US, this 12.5″ Tactical Rifle includes a 11.5″ Free Float Handguard, a B5 Systems Stock, and Grip, and includes one (1) 30 round Magpul PMAG.   SPECIFICATIONS:   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 12.5″ Overall Length 29.5″ Stock Collapsed, 32.75″ Stock Extended Weight 6.5 lbs. Gas Length Mid-Length Rifling 1:8 inch twist Stock Type Adjustable B5