Call of Duty Modern Warfare 3 (MW3)

How to Unlock ZLR Reinforced Lockbolt Attachment

The ZLR Reinforced Lockbolt is a gun attachment found under the Bolts attachment category of Modern Warfare 3 (MW3). Check out our guide to learn how to unlock the ZLR Reinforced Lockbolt and find out all compatible guns for this attachment!

How to Unlock ZLR Reinforced Lockbolt

Level Up Guns in MW3 Multiplayer Modes

The ZLR Reinforced Lockbolt attachment can be unlocked by leveling up the following guns in MW3 multiplayer, Zombies, or Warzone:

Weapon Required Level
Modern Warfare 3 -LA-B 330LA-B 330 Raise the LA-B 330 to Level 19

Complete the Attachment's Armory Unlock Challenge

Alternatively, players who have reached Account Level 25 can opt to complete Armory Unlock challenges to get the ZLR Reinforced Lockbolt attachment, early.

Once you unlock this feature, modify your chosen gun at the Gunsmith and select the ZLR Reinforced Lockbolt from the Bolt attachment slot of your weapon. This should activate its Armory Unlock contract, allowing you to complete Daily and Bonus Challenges to get it earlier.

Armory Unlock Challenges

ZLR Reinforced Lockbolt Compatible Guns

Guns That Can Use the Attachment
Modern Warfare 3 -SP-R 208SP-R 208 Modern Warfare 3 -SA-B 50SA-B 50 Modern Warfare 3 -LA-B 330LA-B 330
Modern Warfare 3 -SP-X 80SP-X 80

Modern Warfare 3 (MW3) Related Guides

Modern Warfare 3 - Attachments

List of All Attachments

Attachment Types in MW3

Attachments By Type
Barrel Stock Ammunition Muzzle
Rear Grip Optic Underbarrel Magazine
Receiver Laser Comb Trigger Action
Guard Bolt Arm Rail
Carry Handle Lever Loader Wire
Conversion Kit

All Bolt Attachments in MW3

All Related Attachments
Blastcap 20" Bolts Brightblaze 20" Bolts Cronen B85 Bolt
Cronen Smooth Bolt Dashbolt 60 Ephemeral Quickbolt
Expedite HZ3 Bolt Expedite L-Bolt Express Light Bolt
FJX Blast FJX H-Bolt FSS ST87 Bolt
FTac Caustic 20" Bolts Hardbolt 2.1 Quick Bolt
Requiem-9 Heavy Bolt SA-M Longdraw SA-M Quickbolt
Smooth Slide Heavy Bolt Stalker Heavy Bolt Titanic Heavy Bolt
XRK Stalker Light Bolt ZLR Reinforced Lockbolt

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