Continuing to expand the ZION family of rifles at IWI US this 18 Special Purpose Rifle (SPR) pays tribute to the MK12 with a modern day update which includes a 17 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 in Middletown Pennsylvania. – 18 SPR Barreled Models – 18 SPR Features a Custom Timney 2-Stage Trigger and ARCA Rail – 1:8 Twist Chrome Moly Vanadium For Maximum Compatibility with All Ammunitions – Nitride Treated for Durability and Accuracy – Free Floated M-LOK Rails for Accuracy and Accessory Compatibility – 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