This is a IWI US, Inc Bullpup known as the Tavor chambered in 223 Remington, model XFD18RS.
The Tavor(R) X95(TM) is the next generation bullpup from IWI US" Inc. Upgrades and enhancements from the original TAVOR(R) SAR include a new fire control pack with a 5-6 lb. trigger pull" repositioning of the ambidextrous mag release to an AR-15 location" a forearm with Picatinny rails at the 3" 6" and 9 o'clock positions with removable rail covers" relocation of the charging handle closer to your center mass" a modular Tavor style pistol grip that can be swapped out to a standard pistol grip with traditional trigger guard and a smaller" lower profile bolt release button.
Features:
Closed Rotating Bolt
Long Stroke Gas Piston
Cold Hammer Forged Barrel
Reinforced Polymer Stock