Kastov LSW MW3 loadout and class build for top performance

Here’s an intriguing lead for an article about the best Kastov LSW loadout and class build in Modern Warfare 3:

“Launched in Season 6, the Kastov LSW boasts the highest fire rate and accuracy in Tac Stance among Modern Warfare 3’s LMGs, making it a monster in close-quarters combat. But with recent nerfs impacting its underbarrel attachments, mastering the optimal loadout is crucial to unlocking its run-and-gun potential. Discover how to build the ultimate Kastov LSW for aggressive playstyles in Multiplayer and Warzone”.

It can’t quite compete with guns such as the TAQ Evolvere or Bruen Mk9 at distance, but when you want to blast enemies away up close, this is the gun for the job. Alongside the high fire rate and impressive accuracy, it also has decent damage and a 100 round magazine, so you can lay down a heck of a lot of suppressive fire.

Here’s the best Kastov LSW loadout in Modern Warfare 3, how to unlock the gun in Season 6, and the best class to use with it.

How to unlock the Kastov LSW in Modern Warfare 3

To unlock the Kastov LSW in Modern Warfare 3, you need to progress through the Season 6 Battle Pass and reach Sector 9, where the weapon is available as a free reward. You earn Battle Pass Tokens by gaining XP through playing multiplayer, Warzone, or MWZ modes, and once you have enough tokens to unlock the rewards in Sector 9, you can claim the Kastov LSW. Alternatively, if you want to unlock it instantly, you can have a friend who already owns the weapon drop it for you in MWZ mode and then successfully exfiltrate with it, which will unlock the weapon for your account. Purchasing the BlackCell Battle Pass bundle also grants immediate access to the Kastov LSW blueprint.

To unlock the Kastov LSW in Modern Warfare 3 Season 6, you must complete cell nine on the battle pass map. The quickest route is through cells 1-3-5-9, completing each one in turn (or you can tick off cell eight instead of five if you prefer the rewards as they both get you to the same place).

As always, new weapons in the battle pass are free, so you don’t need to spend any money provided you have enough tokens.

Best Kastov LSW loadout in Modern Warfare 3

The best Kastov LSW loadout in Modern Warfare 3 focuses on maximizing its high fire rate and exceptional tactical stance accuracy, making it a dominant choice for close to medium-range combat. Key attachments include the Quartermaster Suppressor for recoil control and stealth, the Elevator 020 Long Barrel for range, JAK Glassless Optic for clear sight, and the JAK Slash underbarrel to improve movement and recoil management. This setup leverages the LMG’s 100-round magazine and rapid fire to deliver sustained pressure, ideal for aggressive playstyles that require both mobility and accuracy. Complementing this loadout with perks and equipment that enhance speed and ammo resupply further optimizes performance in both multiplayer and Warzone modes.

Here is the best Kastov LSW loadout in Modern Warfare 3:

Muzzle: ZEHMN35 Compensated Flash Hider
Barrel: Bombast T54 Short Barrel
Underbarrel: Bruen Pivot Vertical Grip
Rear Grip: Demo VIP-09 Grip
Optic: SZ Lonewolf Optic

Due to the Kastov LSW being geared towards close quarters combat, we actually don’t need to enhance that aspect of the gun any more with our attachments. If we lean too heavily toward that aspect, the recoil becomes too much even up close.

So we need to balance that out while retaining its handling and mobility, which the ZEHMN35 Compensated Flash Hider is great for. It buffs both the horizontal and vertical recoil, firing aim stability, and has the added benefit of shortening radar pings. The only downside is a slight nerf to the aim down sight speed and bullet velocity, the latter of which is largely irrelevant at such short ranges.

However, the Bombast T54 Short Barrel brings back that ADS (aim down sight) speed lost, alongside buffing the movement and sprint to fire speeds, and the hipfire and tac stance spread, which the gun already excels at. Tactical stance is very situational, but this is a great gun to rely on it often for. Then, the Bruen Pivot Vertical Grip once again helps with the vertical recoil, which is far worse on this gun than the horizontal recoil is.

Because you’ll still be very mobile, despite this being an LMG, the Demo VIP-09 Grip again buffs the ADS and sprint to fire speed, while choosing an optical sight is recommended because the iron sight on this gun isn’t great. We’ve gone for the SZ Lonewolf Optic because it will help a touch at medium range, but if you want an even quicker ADS time, go for a shorter range red dot sight.

Best Kastov LSW class in Modern Warfare 3

The best Kastov LSW class in Modern Warfare 3 is designed for aggressive close- to medium-range combat, capitalizing on the weapon’s top-tier fire rate and tactical stance accuracy among LMGs. Key attachments include the Bombast T54 Short Barrel for enhanced handling, the Quartermaster Suppressor to manage recoil, and the Bruen Pivot Vertical Grip for stability. Optics like the SZ Lonewolf or JAK Glassless provide clear sightlines without sacrificing mobility. Complementing perks such as Stalker Boots for faster strafing, Compression Plate for durability, and Ghost for stealth maximize the LSW’s combat effectiveness. This setup transforms the Kastov LSW into a versatile run-and-gun powerhouse, excelling in suppressive fire and quick engagements while maintaining manageable recoil and high mobility.

Here is the best class to use alongside the Kastov LSW in Modern Warfare 3:

Vest: Gunner Vest
Secondary: Kar98k
Tactical: Flash Grenade
Lethal: Sticky Grenade
Field Upgrade: Trophy System
Gloves: Quick-Grip Gloves
Boots: All-Terrain Boots
Gear: EOD Padding

The Kasotv LSW struggles at long range, so when you’re in a gunfight you don’t quite have the capabilities for with your primary, you’ll want the Gunner Vest equipped so you can swap to the Kar98k and pick them off with a quick headshot. The Gunner Vest also has the added benefit of improving your reload speed – handy when using an LMG – and it makes you spawn with max ammo.

For your throwables, the Flash Grenade is always an ol’ reliable, and since you can detonate a Sticky Grenade quicker than a Frag in hectic situations, we’ve opted for that in the Lethal slot. The Trophy System is always a good shout too as it destroys any incoming throwables, best placed on an objective.

A lot of the gloves are viable here, but we’ve opted for the Quick-Grip Gloves because it improves the weapon swap speed by 40% minimum, which is a huge help when swapping from an unwieldy LMG to a marksman rifle. That’s followed up with the All-Terrain Boots which improve your movement speed, although the Tactical Pads, Stalker Boots, Covert Sneakers, and Lightweight Boots are all viable options depending on your preference.

Finally, the EOD Padding protects you from explosives, but the Tac Mask is an option too if you’d rather protect yourself from stuns, flashes, and the like.

How can I maximize the Kastov LSW’s close-range power in MW3

To maximize the Kastov LSW’s close-range power in Modern Warfare 3, focus on these key strategies:

Prioritize mobility over cover: Use the Kastov LSW’s high fire rate and Tac Stance accuracy to stay on the move, making it harder for enemies to hit you. Sprinting, sliding, and quick directional changes in tight spaces help you outmaneuver opponents and capitalize on close-quarters engagements.
Engage at optimal distances: The Kastov LSW excels within 20 to 50 meters. Use it aggressively in small maps or modes like Resurgence where close combat is frequent, allowing you to unleash rapid, sustained fire to overwhelm enemies.
Customize your loadout: Equip attachments that enhance recoil control, damage range, and bullet velocity to improve effectiveness. Consider barrels for stability, optics for precision, and suppressors to maintain stealth during ambushes.
Leverage map knowledge: Position yourself in enclosed or high-traffic areas where the LSW’s strengths shine. Avoid open spaces where long-range weapons dominate.
Coordinate with your team: Use communication to control choke points and execute flanking maneuvers, maximizing the LSW’s firepower in coordinated attacks.

By combining aggressive movement, optimal engagement range, tailored attachments, map awareness, and teamwork, you unlock the full close-range potential of the Kastov LSW in MW3.

What loadout setups boost the Kastov LSW’s close-range damage

To boost the Kastov LSW’s close-range damage in Modern Warfare 3 and Warzone, the best loadout setups focus on enhancing recoil control, damage range, and mobility while maintaining high fire rate and accuracy. Key attachments and perks include:

Attachments:

Muzzle: Quartermaster Suppressor or S-37C DL Breacher – these improve damage range and reduce recoil, helping maintain accuracy in close quarters.
Barrel: Mitigator X40 Heavy Barrel or Elevator D20 Long Barrel – these barrels help control recoil and increase damage range, crucial for close to mid-range fights.
Underbarrel: Paracord Grip or Bruen Heavy Support Grip – these grips reduce recoil and improve stability, making it easier to land shots rapidly at close range.
Stock: Spetsnaz S15 Stock – enhances recoil control and mobility, allowing quicker movement and better handling in tight spaces.
Optic: JAK Glassless Optic – provides a clear sight picture with minimal obstruction, aiding quick target acquisition in close combat.

Perks:

Double Time: Counters the LMG’s heavy weight by increasing sprint duration and speed, improving close-range maneuverability.
Sleight of Hand: Speeds up reload times, essential for an LMG with slower reloads during intense close-range fights.
Quick Fix: Regenerates health quickly after kills or armor plate usage, sustaining you in aggressive engagements.
High Alert: Alerts you when enemies spot you, helping you react faster in close encounters.

Equipment:

Tactical: Flash Grenade – to disorient enemies before rushing in close quarters.
Lethal: Sticky Grenade or Thermite – for quick area denial and finishing off enemies in tight spaces.

This combination balances the Kastov LSW’s rapid fire and large magazine with improved recoil control and mobility, maximizing its close-range lethality and survivability in Modern Warfare 3 and Warzone.