Designed with a similar premise as the Cornershot, the Concealed Engagement Unit by Aimpoint allows a shooter to take aim while mostly behind cover. I guess the only thing you'd have exposed would be your hands and maybe your arms. The device is basically a sight that is viewed at an angle and can be flipped in and out of use quickly. Simple enough. I was going to get one installed on my BB gun until I realized my mom took it away from me for shooting the heads off her terrorist roses. I tried to explain I was protecting the house from flowery insurgents but she slapped me. Hard. It happened so fast it may have actually been a roundhouse kick.