SCP-127

SCP-127, otherwise known as the "Living Gun", is a modified MP5S firearm that has two forms. It can look like a normal MP5S when on the ground and have legs and move around. It can grow four legs around it to walk around. SCP-127 has one eye on the front of the gun above the firing barrel. 

SCP-127 can fire teeth-like bullets, though may only be picked up when it's lying down. Personnel can ask the anomaly to pick it up, once picked up it acts like a normal firearm. It has 30,000 reserve ammo and 30 munitions inside of the magazine. SCP-127 is capable of firing by itself. SCP-127 can also attack by using one of its legs to hit somebody.