Another handful of mags through the Dakota Tactical D54-10 MP5/10 clone. Pushing through the break-in period; you can see me check to make sure the gun is in battery as it was having a bit of an issue going into battery on a full mag early on. Seems have to dropped off a bit after the 300 I have put through it so far.

Side funny note: don't have this recorded as my phone stopped recording for a mag and a half for some reason, but a few RSO's came up to me asking if I was using a binary trigger; they have no issue with rapid fire, but they don't allow any devices that allow you to shoot faster.