An incredibly compact weapon, this is closer to a machine pistol then it is a submachine gun. Around 1.3 kg / 3 lbs and approximately 25 cm / 10 inches, this thing occupies as much space and mass as a large pistol but with that 21 cm (8 inches) 446g (1 lbs) magazine it pulls its center of mass central and low making it handle very cleanly with the ability to naturally turn around its center point quickly.
The 23 cm / 9 inch extendible stock is a bit tight for bigger operators but for most it functions as a better-then-nothing short stock. Although not strictly necessary, the frame stock offers a solid support for keeping that full auto fire on target. The weapon fires from an open bolt just like the real thing which is a nice touch if not ideal for outdoor gaming for reasons of fouling.
This model features the System 7 gas system which is both reliable and consistent as well as featuring enough robustness to tolerate wear and tear over time very well. The weapon is also all-metal so unlike other polymer models this one not only feels more realistic but it generally feels and sits better in terms of mass and rigidity.
Speaking of fire, this M11 keeps the groups pretty tight; on full auto, things open up a bit with is 20 BBs per second rate of fire which can empty the entire 48 round magazine in less than 3 seconds. Consequently, controlled bursts of 2-3 rounds is entirely manageable with short trigger taps which helps keep your fire controllable but still high threat against your targets. Despite its controllability, its high cyclical rate means that even short bursts sound like small chainsaws exploding which does a good job of spooking the enemy.
Note: The fps quoted is for reference only, actual results might vary according to individual products.