Iron Horse DMR Rifle(TM) Designated Marksman Rifle chambered in 5.56 Nato. The Thumb Operated Receiver(TOR) was invented by US Marines to cure trigger jerk, trigger pull, and other trigger actuation involved shooting errors. The IHA1 series rifles offer the latest lever driven fire technology on the market. If you are looking for this years hunting rig, or your next long range gun, look no further as this rifle provides the best of bolt action rifle precision and gas gun performance. Did we mention it has a lifetime warranty? Iron Horse Lever Fired Lower Includes: * 7075 ALUMINUM LOWER RECEIVER, SKELETONIZED BILLET TRIGGER GUARD, FLARED MAGAZINE WELL, AMBIDEXTROUS CONTROLS, INTUITIVE SLIDE SWITCH SAFETY