The trigger pull on the Bond is not straight back like a regular gun. It levers back and down. Make sure the gun is unloaded, and then try pressing the lower part of the trigger down and back. Breaks easy and clean.
From the bondarms.com faq:
How is the trigger pull?
The trigger pull on our pistols is approximately between 6 and 7 1/2 pounds which is within the acceptable range for a pistol of this type. Derringers, being small compact pistols, require the user to operate the gun in a specific manner.
1. With the hammer in the full cock position, grasp the grip with your shooting hand making sure that your hand is not touching the cocked hammer. Any amount of pressure applied to the cocked hammer by your hand will increase the trigger pull substantially.
2. Make contact with the trigger using the pad of your trigger finger. Avoid pulling the trigger with the bend of your first knuckle.
3. Pull the trigger back and downward.
I own and have owned several of them. Once you get used to the trigger and practice, they can be surprisingly accurate and fun guns to shoot and own.