The DAA Quad Loader is machined from sturdy aluminum and Delrin, creating a tough efficient design that allows you tilt adjustment and quick interchangeability when mounted to our Alpha Rail System Base. (Supplied as standard)
Strong embedded magnets hold the top rounds securely in place, and flexible clamps machined into the lower platform contribute further to the retention. Shake these all you like, and you will not be able to dislodge the shells! But grip them in your hand and pull outwards – and they pop out with practically no resistance.
Adjusting for various shell lengths can be done on the fly, without removing your rig, and without any tools. Simply turn the large tension wheel and the upper support slides up and down the rail to match your shell length.
Colored laser-cut insert plates decorate the upper and lower supports and are available in several colors.
Pictues and description from Double Alpha