Mossberg MMR User Manual download pdf (Page 16)

Clean the bolt carrier key with a pipe cleaner (Fig. 39). Clean the bolt hole and

cam pin slot with patches and a soft nylon brush. Dry the bolt hole and cam pin

slot with clean patches.

Remove powder residue and carbon from all external surfaces of the bolt using

solvent-soaked cleaning patches and a brass brush. Clean the ring pin hole

with a pipe cleaner. Apply solvent to the gas rings until they are able to move

freely. Wipe all the remaining solvent off of the bolt using clean patches. Inspect

the bolt (Fig. 40) and bolt face (Fig. 41), ring pin (Fig. 42), cam pin (Fig. 43), ring

pin retaining pin (Fig. 44), extractor (Fig. 45), and bolt carrier (Fig. 46) for cracks,

fractures, chips and wear.

Should you detect any cracks, fractures, chips, or excessive wear,

do not use your rearm until you have contacted the Product Service

Center or a qualied gunsmith. Using broken or worn parts may

result in a dangerous malfunction, damage to the rearm, and serious

personal injury to the shooter and/or others nearby.

EJECTOR

Fig. 37

Fig. 38

Fig. 40

Fig. 41

Fig. 39

Apply oil to the ejector (Figs. 37 and 38).

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Mossberg MMR User Manual Page 16