Visually inspect the buttstock for cracks. If cracked, replace buttstock.

Visually ensure the locking ring (4) and securing screw bushing (5) are physically in place within the buttstock.

Inspect the screws for burrs or stripped threads. If found, replace. If hollow buttstock securing screw is broken or cracked, replace.

Check buttplate for cracks, deformations and burrs. Remove burrs with file. If cracked or deformed, replace buttplate.

If buffer housing and plug assembly need repair, evacuate weapon to direct support maintenance. M240B/M240N: If hydraulic buffer is loose from buffer housing, evacuate to direct maintenance. REASSEMBLY

Install the buffer housing and plug assembly (7) in to the front end of the buttstock (6); secure firmly with the butt securing screw (3).

Attach the buttplate (2) using the two screws (1).



This task covers: a. Disassembly b. Inspection c. Repair d. Reassembly INITIAL SETUP

Tools and Special Tools

Tool Kit, Small Arms Repairman, PN SC 5180-95-B71; SL-3-08724A (Marine Corps only); SL-3-00607A (Marine Corps only)


Crocus cloth, abrasive (item 3, WP 0074 00) Spring, pin (1), PN 11826068-1

Equipment Condition

Bolt and operating rod removed from receiver (TM 9-1005-313-10).

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