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M-300 Claymore

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The M-300 Claymore Heavy Shotgun is a shotgun in Mass Effect 2 and Mass Effect 3.

Mass Effect 2 Edit

M300Claymore
M-300 Claymore
Type Shotgun
Location Collector Cruiser
Accuracy Low
Recoil High
Fire Mode Single shot
Fire Rate Low
Reload Time 1.5 s
Damage Stats
Base Damage 50.1 (400.8)
Damage Multipliers Armor x1.25
Shields x1.25
Barriers x1.25
Ammunition Stats
Shots Per Clip 1
Maximum Spare Ammo Capacity Default 10
Armor Pack 11
Upgraded 20
Both 21
Ammo Pickup Amount 4 - 7

Description Edit

Very rare krogan shotgun. Deals high damage at short range; less effective at long range. Effective against armor, shields and biotic barriers. It is of human design but is only used by krogan, due to the fact that the kickback from a single shot has enough force to break a human's arm. Protected by Fabrication Rights Management (FRM) technology, this weapon is nearly impossible to reproduce and is prohibitively expensive.

Acquisition Edit

  • If playing as a Soldier or a Vanguard, the player will have the option of acquiring this during the Collector Ship mission.
  • After recruiting Grunt, asking him about upgrades will make the M-300 available for research as a weapon for him. Only Grunt can use this Claymore.

Note: This weapon is exclusive to Shepard and Grunt. No other squadmates may choose to use it.

Squad Usage Edit

  • Only Grunt can wield the M-300 and he deals 40% less damage than Shepard.
    • For Grunt it may be a better idea to use the M-22 Eviscerator Shotgun over the M-300 because the Eviscerator has a longer range and has similar damage rate. Grunt may deal more damage with the M-22 in certain situations than he would with the M-300 because squad members tend to shoot shotguns at a longer range than a player would, and tend to shoot more often with weapons that possess a larger clip and higher rate of fire than weapons with a lower fire rate and clip size.

Player Notes Edit

General Notes

  • The M-300 only holds one round per thermal clip and a limited amount of spare ammunition. Coupled with its short-range and high damage, these qualities make the M-300 a "high-risk, high-reward" weapon.
  • The Claymore's fire rate can be improved by holding the fire button and performing a melee attack on hearing the click sound during reloading
    • This reduces the delay between shots from 2.4 seconds to approximately 1.4 seconds.
    • This can be repeated to maintain a constant improved fire rate.
  • The Claymore becomes less useful on higher difficulties when one-shot kills are more difficult to accomplish.

Class Specific Notes

  • For Vanguards, when used with the Heavy Charge evolved ability, the player can inflict heavy damage by immediately following up with a powerful blast at point-blank range, all before the enemy has time to react.
  • It is inadvisable to use this tactic against boss characters with multiple protection layers (unless they are the only remaining enemy, at which point the squad can focus their attention).

Mass Effect 3 Edit

Trivia Edit

  • The M-300 Claymore is likely named after the two-handed Scottish sword.
  • While the M-300 is described as being usable only by krogan in Mass Effect 2, members of other races are shown using it, including the turian Command Bodyguard and the asari Captain Enyala.
  • The Mass Effect 3 M-300 Claymore model is much smaller than the one used in Mass Effect 2.
  • In Mass Effect 3, the weapon is depicted as having a grey coloured body in the menus. In-game and during modification, however, it is depicted as being green by default. This colour of this part will be changed if the Smart Choke modification is attached.
  • Wreav's/Wrex's shotgun on Priority: Sur'Kesh seems to look like a Claymore. However, Eve fires it twice, suggesting it may be modified or a different weapon altogether.

See Also Edit


Mass Effect 2 Weapons
Heavy Pistols M-3 PredatorM-6 CarnifexM-5 Phalanx
Submachine Guns M-4 ShurikenM-9 TempestM-12 Locust
Shotguns M-23 KatanaM-27 ScimitarM-300 ClaymoreM-22 EvisceratorGeth Plasma Shotgun
Assault Rifles M-8 AvengerM-15 VindicatorGeth Pulse RifleM-76 RevenantCollector Assault RifleM-96 Mattock
Sniper Rifles M-92 MantisM-97 ViperM-98 WidowM-29 Incisor
Heavy Weapons M-100 Grenade LauncherML-77 Missile LauncherM-622 AvalancheM-920 CainCollector Particle BeamM-490 BlackstormM-451 FirestormArc Projector
Mass Effect 3 Weapons
Heavy Pistols M-3 PredatorM-5 PhalanxM-6 CarnifexM-11 SuppressorM-77 PaladinM-358 TalonAcolyteArc PistolExecutioner PistolN7 EagleScorpion
Submachine Guns M-4 ShurikenM-9 TempestM-12 LocustM-25 HornetBlood Pack Punisher
Collector SMGGeth Plasma SMGN7 Hurricane
Shotguns M-11 WraithM-22 EvisceratorM-23 KatanaM-27 ScimitarM-300 ClaymoreAT-12 RaiderDiscipleGeth Plasma ShotgunGraal Spike ThrowerN7 CrusaderN7 PiranhaReegar CarbineVenom Shotgun
Assault Rifles M-7 LancerM-8 AvengerM-15 VindicatorM-37 FalconM-55 ArgusM-76 RevenantM-96 MattockM-99 SaberAdas Anti-Synthetic RifleCerberus HarrierChakram LauncherCollector RifleGeth Pulse RifleGeth SpitfireN7 TyphoonN7 ValkyrieParticle RiflePhaestonStriker Assault Rifle
Sniper Rifles M-13 RaptorM-29 IncisorM-90 IndraM-92 MantisM-97 ViperM-98 WidowBlack WidowCollector Sniper RifleJavelinKishock Harpoon GunKrysae Sniper RifleN7 Valiant
Heavy Weapons M-451 FirestormM-560 HydraM-597 LadonM-920 CainCobra Missile LauncherGeth Combat SoftwareGeth SpitfireReaper BlackstarSync Laser

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