Not included: Brush, compressed air, blade 
Clean backstrap area with a clean nylon brush. An old toothbrush will do. DO NOT use a brush that has been in contact with oil based solvents. 
Gently clean with provided cleaning pad 
Blow remaining residue off with compressed air. Blow on it if need be but don’t spit on it. 
Check position before removing tape. You won’t be able to install completely but can see the alignment. 
Remove tape carefully, starting at a corner, with a razor blade. 
Align ejector housing pin cutout with the bottom of the notch for the cutout on the backstrap. Press one side forward until seated. 
Press the other side forward until seated. 
Very firmly grip the gun for 30 seconds. Wait at least 24 hours before use to let the adhesive set. 
To remove: apply firm pressure using the notch cut into the Backstrap as a grip point. Push towards the opposite side of the gun. The adhesive sticks quite well, you may need to wear gloves with some grip. Slowly keep pushing to the side until removed.
