Note

The enhanced and standard M242 Gun breech assemblies are NOT interchangeable. The enhanced gun must use the 12524527 breech assembly. The standard gun must use 12524370 breech assembly.

If guide pin was loose during removal, ensure that it is present for installation. A loose breech guide pin will not degrade the function of the gun.

1. INSTALL BREECH ASSEMBLY.

Slide breech assembly (1) into breech sleeve (2). Pass breech lug (3) into slot (4) in breech sleeve (2). Push breech assembly (1) into breech sleeve (2) until breech lug (3) is 6 in. (152.4 mm) away from receiver wall (5).

2. INSTALL BARREL SUPPORT ASSEMBLY (WP 0050 00).

3. INSTALL RECOIL MECHANISM (WP 0049 00).

4. PERFORM AUTO GUN RECEIVER MANUAL CYCLE CHECK (WP 0008 00).

5. INSTALL AUTOMATIC GUN FEEDER (WP 0026 00). END OF WORK PACKAGE

M242 12524527
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