A2 birdcage > M203 bracket
Following on from a user's previous post out a short barrel AR with a '203 - the mounting bracket interfaces perfectly with an A2 birdcage, allowing you to run a 12.5(?) barrel with an M203.
Following on from a user's previous post out a short barrel AR with a '203 - the mounting bracket interfaces perfectly with an A2 birdcage, allowing you to run a 12.5(?) barrel with an M203.