Airsoft GI got a livestreamed episode on YouTube with Frank of Classic Army as guest. They talk about the Classic Army Nemesis X9 AEG, which is a compact SMG-style AR AEG which uses a 9mm style magazine. It's on pre-order at Airsoft GI... "The X9 is perfect for players who want a sleek, compact SMG for very tight close quarters gameplay, while retaining all of the function, feel, and fire controls of the familiar AR15 / M4 style platforms. An MLOK handguard affords you the ability to mount any compatible accessories to the front of your X9 in virtually any configuration you can think of. Toward the back, you will see a three-position, PDW-style stock with a unique, spacious and user friendly battery compartment latch that makes swapping out batteries on the fly a total breeze.

Internally, the X9 sports Classic Army's 2018 ECS Programmable Trigger unit and Mosfet, giving you the option to set your gun to 3 or 5 round burst while providing protection for your trigger switch. Combined with the pre-installed flat trigger system, the ECS allows for blazing fast trigger response with negligible motor spin up time - as every fraction of a second counts in CQB.

To top it all off, the X9 is backwards compatible with all previous Classic Army Nemesis series AEG upper receivers, giving you the ability to swap out rail systems and barrel lengths quickly to suit any changes in environment or play style."