Maintenance Instructions

10044S
Colt Canada Proprietary 3-2-41 2005-09-20
62. Inspection and Repair. Inspect and repair the receiver extension components as
follows:
a. Inspect the receiver extension for dents, cracks and other deformation that would impede
the action of the sliding buttstock, buffer assembly, or return spring;
b. Ensure that the receiver extension vent hole is clear;
c. Check the receiver end plate and receiver extension nut for cracks or deformation that
would affect security of the receiver extension or takedown pin detent;
d. Remove nicks and burrs with a smooth file or fine stone, taking care not to alter original
critical dimensions. Touch up affected areas as detailed in Part 3, Section 1 of this
instruction; and
e. Replace defective components as required.
63. Reassembly and Replacement. Replace the receiver extension as follows:
a. Assemble the receiver extension nut and receiver end plate to the receiver extension with
the staking slots of the nut facing the end plate;
b. Screw the receiver extension into the lower receiver until it is flush with the rear edge of
the buffer retainer hole;
c. Insert the buffer retainer spring and the retainer into the hole in the receiver;
d. Screw the receiver extension forward far enough to trap the buffer retainer leaving
sufficient clearance to allow correct function of the retainer;
e. Rotate the receiver end plate to allow
insertion of the takedown pin detent
and spring into the receiver;
f. Assemble the takedown pin, detent and
detent spring to the receiver;
g. Realign the receiver end plate with the
receiver contours and press the end
plate forward to trap the detent spring in
the receiver. See Figure 3-2-55;
h. Tighten the extension nut with the hook-
spanner wrench and a 1/2 inch drive
torque wrench;
j. Check the action of buffer retainer;
Figure 3-2-55 Reassembling the Receiver
Extension