Jag Precision, which has the new Echo1 Genesis M4 Series, does a stress test on the AEG as shown in the video below... "Introducing the new Genesis M4 Series by Echo1. This is a skirmish ready M4 that will take any upgrades out on the market. It’s a great M4 that anyone can afford, coming with a battery, charger, and high cap magazine all at very affordable price.

There are 3 lengths available for the Genesis: Carbine length, Commando length for CQB, and a new mid-length model. The M4 Carbine and M4 Mid shoots 380-390fps out of the box with 0.20g BBs, making it excellent for outdoor games. The Commando version shoots at 330-350fps making it ideal for CQB. The new Mid-length style M4 gives you a longer sight radius and a longer handguard for better control, while keeping it at the normal overall M4 length. On the mid-length M4 you could get more potential rail space due to the longer handguard. As an added bonus, the flash hider is compatible for mounting an Echo1 Mk1 SR556 barrel extension out of the box."