Triggers are pretty straightforward. You can set up a time based trigger (# of months) and/or a round count trigger. Each month when your subscription hits we'll allocate your inventory to your account and check any active triggers you have (they need to be on your subscription and "active" because people change triggers all the time). If your shipping is "triggered" by # or months since last shipment or # of rounds, we ship out your ammo. We first apply any coupons or credits and charge your card on file for any shortfall. You don't have to do anything.