Ruger 10/22 Takedown .22 LR. - Reliable and accurate. The Takedown splits into 2 subassemblies by simply pushing a recessed lever, twisting the subassemblies, has an adjustment knob to eliminate play between the halves. After reassembly, the firearm returns to zero, even when receiver-mounted optics are used. The barrel is made of corrosion resistant stainless steel. The 10/22 utilizes a simple blowback semi-auto action, and a 10-shot rotary magazine, also has 3 25 round additional magazines and an added extended magazine release allows for rapid reloading. Two of the pictures were prior to adding the extended mag release and I do not have the Ruger backpack.