Mossberg MMR User Manual

2IMPORTANT “SAFETY WARNINGS” — NOTE THE SYMBOL THESE SAFETY WARNINGS ARE FOR YOUR PROTECTION AS WELL AS THE SAFETY OF OTHERS. DISREGARDING INFORMATION

10With the rearm pointed in a safe direction and held in the proper ring position, rotate the safety selector lever fully to the vertical “OFF” (FIR

11Each brand and type of ammunition can produce different accuracy results. It is best to try as many brands and types of ammunition as possible to d

12Fig. 20Fig. 21Fig. 22Use a punch to remove the ring pin retaining pin (Fig. 23) by pushing through the ring pin retaining pin hole on the right si

13Fig. 25Push the bolt subassembly in (Fig. 26) and twist the cam pin a quarter turn and lift to remove the cam pin on the 5.56 model (Fig. 27). Lift

14 Use a punch to depress the buffer retainer (Fig. 31) and remove the buffer assembly and action spring (Fig. 32). The hammer

15Fig. 35Further disassembly of the rearm should be performed by a qualied gunsmith only.CLEANING AND LUBRICATIONWith proper maintenance and care,

16Clean 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 h

17Fig. 42Fig. 43Fig. 44Fig. 45Fig. 46Make sure the barrel and receiver are free of obstructions and excessive lubricant after cleaning. Be sure not t

18Lightly lubricate the bolt and cam pin. Insert the bolt into the carrier with the extractor on the right side as shown (Fig. 48) and r

19Fig. 52Apply a light coat of oil to all surfaces of the bolt carrier assembly. Apply one drop of oil in each hole on the right side of the bolt car

2As the owner of a rearm, you must undertake the full-time responsibility of safe rearms handling for your own safety and the sa

20Remove your nger from the trigger. Rotate the safety selector lever fully to the “OFF” (FIRE) position. The hammer should not release.Leave the

21Fig. 56Long and Short Range Apertures: The rear sight has two apertures. The large aperture is for short range shooting while the small aperture i

22Should your rearm or any component of your rearm require service, ship your entire rearm (please do not send components only), via your

23MOSSBERG® WARRANTYMOSSBERG MODERN RIFLETWO (2) YEAR LIMITED WARRANTYLimited Warranty: O.F. Mossberg & Sons, Inc. (“Mossberg”) warrants to you, t

24Parts List: Hunter ModelsItem No.DescriptionItem No.Description1* Lower Receiver 27 Hammer Spring2 Trigger 28 Hammer Pin3 Trigger Pin 29*Bolt Carri

25HUNTER MODELSEXPLODED VIEW123161.indd 25 10/7/11 12:09 PM

26Parts List: Tactical ModelItem No.DescriptionItem No.Description1* Lower Receiver 30 Firing Pin2 Trigger 31 Firing Pin Retaining Pin3 Trigger Pin 3

2728 Hammer Pin 57 Handguard Screws29*Bolt Carrier with Bolt Carrier Key*Items on Parts List are reserved for qualied gunsmiths or the Authorized Pro

28NOTES123161.indd 28 10/7/11 12:09 PM

29NOTES123161.indd 29 10/7/11 12:09 PM

3A note about the warnings and information contained in this manual:We strongly suggest that you check with your local licensed retailer or state poli

30NOTES123161.indd 30 10/7/11 12:09 PM

31NOTES123161.indd 31 10/7/11 12:09 PM

32From the time an individual picks up a rearm, that individual shooter becomes a part of a system over which he has complete control. He is the onl

4GENERAL INFORMATION AND MECHANICAL CHARACTERISTICSThe MMRTM is designed to operate with the ammunition caliber inscribed on the barrel and as shown b

5GENERAL INFORMATION AND MECHANICAL CHARACTERISTICS CONT.Fig. 1 – MMR 5.56 Hunter (Right Side)Fig. 2 – MMR 5.56 Hunter (Left Side)Fig. 3 – MMR 5.56 Ta

6GENERAL INFORMATION AND MECHANICAL CHARACTERISTICS CONT.Fig. 5 – MMR 7.62 Hunter (Right Side)Fig. 6 – MMR 7.62 Hunter (Left Side)MECHANICAL SAFETYThe

7OPENING THE ACTIONThe bolt catch is located on the left side of the receiver above the magazine well (Fig. 2).The bolt catch allows the action to be

8LOADING THE FIREARMBefore loading, rotate the safety selector lever fully to the horizontal position to place it in the “ON” (SAFE) positio

9 To minimize the risk of unintended ring, leave the chamber empty and the safety selector lever in the “ON” (SAFE) position until you are on tar