Maintenance Instructions

10044S

Colt Canada Proprietary 3-2-16 2005-09-20

c. Repeat the above, torquing the nut a total of three times.

NOTE

The multiple torquing procedure provides for a better thread fit and ensures that the barrel

nut will not work loose.

14. Rebreeching Existing Barrel. Using the combination wrench and a 1/2 inch drive

torque wrench, torque the barrel nut assembly to between 41 and 108.5 N

m (30 and 80 ft-lb),

ensuring that all three drive pins of the combination wrench are evenly engaged in the barrel nut.

15. Refer to Figure 3-2-23 and check the alignment of the barrel nut with the upper receiver

as follows:

a. Insert the alignment tool in the bolt carrier key;

b. Insert the bolt carrier into the upper receiver from the rear;

If the barrel alignment tool does not pass freely through a notch in the barrel nut, tighten

barrel nut until the barrel alignment tool passes freely. DO NOT torque over 108.5 N

(80 ft-lb) as damage to the upper receiver threads will result.

c. Tighten the barrel nut as required to allow passage of the alignment tool.

Figure 3-2-23 Using the Barrel Nut Alignment Tool