Instructions Installing Magazine Insert The insert will slide in on the grooves. Place the edges of the insert in the grooves. Push the insert into the base. Once the insert is in, rotate it into place. The insert will snap into place flush with the top and bottom of the base. Installing Barrel Insert The insert will slide in on the grooves. Set the insert into the grooves and slide it down. Rotate the insert into place. The insert will snap into place flush with the top and bottom of the base. Press the post into the insert. Removing Magazine Insert Push up on the front of the insert from the bottom while pulling back on the post to pop the insert out of place. Continue rotating the insert backwards until it is lined back up with the grooves. Push the insert forward out of the base. Continuing pushing until the insert is removed. Removing Barrel Insert Push up on the front of the insert from the bottom while pulling back on the base of the post. Continue rotating until the insert is in position to remove. Once the insert is at the correct angle, push it out from the bottom. Continue pushing the insert out until it is removed.