This shoot bolt/shoot tip fits both the Under Premiere 1000 and 2000 Series multipoint locks with a 16mm faceplate.
Multi-point Lock Top Shootbolt Extension - not shipped with  active or Inactive Gear
Overall length is 11 inches.

Shoot bolt tip extended is 7/8 inch.
Stamped numbers on back of gear 055 S.
5670-80-81 is used for mp locks with 20mm faceplate.

Multi-point Lock Top Shootbolt Extension - not shipped with  active or Inactive Gear

Overall Length: 12 Inches (304.8mm) with shootbolt extended
Shootbolt Extends: 1 Inch (25.4mm)
Face Plate WIdth: 5/8 inches (16mm)
Face Plate Length: 9 inches (228.6mm)

Used with Active or Inactive shootbolt - top extension
Material: Stainless Steel
Markings:  304 SS;  

INSTALLATION NOTE: 
There is a small black plastic pin that prevents the shootbolt from extending before installing;
The purpose of the plastic pin is to be sure the connection is made in the retracted position.
After installation and when handle is raised the pin will shear off and work properly.