Heat oven to 350° Fahrenheit. Grease a jelly roll pan.
Unwrap caramels and place in a small saucepan. Set aside.
In a small bowl, combine soda, salt, flour, and oats. Set aside.
In a medium mixing bowl cream butter, peanut butter, and brown sugar. Gradually add flour mixture to butter mixture, beating until combined.
Press peanut butter mixture into greased pan.
Bake at 350° for 12-15 minutes or until golden brown. While it's baking, move on to the next step.
In a small saucepan over low heat, melt the sweetened condensed milk with the caramels. Stir constantly because it burns easily. Remove from heat once melted and creamy. When the crust is finished in the oven, pour the caramel over the crust.
Toss the chocolate chips onto the hot caramel. Let is sit for a couple of minutes, just until the chocolate is soft and then gently spread the chocolate over the bars. Top with mini M&M's.
In a small bowl, melt almond bark and oil in microwave, stirring until smooth. Drizzle with a fork over the bars. Let cool for a couple of hours before cutting. Store at room temperature in an airtight container.