How many Mk II weapons are there in GTA Online?

Twelve: Pistol, SNS Pistol, Heavy Revolver, SMG, Combat MG, Assault Rifle, Carbine Rifle, Special Carbine, Bullpup Rifle, Pump Shotgun, Marksman Rifle, and Heavy Sniper Mk II. Converting all of them costs $1,300,700 as of July 2026.

Which Mk II weapons are worth buying in 2026?

Three are essential: Heavy Sniper Mk II ($165,375), Combat MG Mk II ($119,000), and Special Carbine Mk II ($135,000). The Pump Shotgun Mk II ($82,500) is the best budget add for its Explosive Slugs.

Do you need Bunker research to get Mk II weapons?

No - any Weapon Workshop converts a standard weapon to Mk II with no research. Bunker research (or a fast-track payment) is only needed for special ammo types like explosive rounds and for certain attachments.

How much does it cost to convert every weapon to Mk II?

$1,300,700 in conversion fees for all 12 weapons, as of July 2026. With base weapons, key attachments, and special ammo research, a full collection runs well past $3 million.

GTA Online

Mk II Weapons Guide

GTA Online has 12 Mk II weapons costing $1,300,700 in total conversions - but you only need three: Heavy Sniper Mk II, Combat MG Mk II, and Special Carbine Mk II.

Video via TGG

Key facts

Cost	$1,300,700 to convert all 12 (individual conversions range $73,750 to $165,375)
Best overall	Heavy Sniper Mk II ($165,375 conversion) - explosive rounds define the game
Best value	Pump Shotgun Mk II ($82,500 conversion) - cheapest path to explosive ammo
Skip unless rich	Pistol Mk II, SNS Pistol Mk II, Bullpup Rifle Mk II, Heavy Revolver Mk II
Buy first (top 3)	Heavy Sniper Mk II, Combat MG Mk II, Special Carbine Mk II ($419,375 in conversions)
Total cost all 12	$1,300,700 in conversion fees alone, as of July 2026
How to unlock	Any Weapon Workshop converts them; only special ammo and some attachments need Bunker research

Mk II weapons are upgraded variants of standard GTA Online guns, converted at a Weapon Workshop (installable in the MOC, Avenger, Terrorbyte, Arena Workshop, and similar properties). Converting requires no Bunker research - a common misconception - though many special ammo types and attachments are research-locked. There are 12 Mk II weapons, and converting all of them costs $1,300,700 as of July 2026, before base guns, ammo, or attachments.

Here is every Mk II weapon ranked, with its verified conversion cost and a one-line verdict. 1. Heavy Sniper Mk II ($165,375): the best weapon in the game once explosive rounds are unlocked; buy first. 2. Combat MG Mk II ($119,000): the best sustained-fire gun for heists and defense; buy second. 3. Special Carbine Mk II ($135,000): the best all-round assault rifle; buy third. 4. Pump Shotgun Mk II ($82,500): the cheapest route to explosive ammo via Explosive Slugs; the sleeper pick. 5. Carbine Rifle Mk II ($107,500): a fine rifle, redundant if you own the Special Carbine Mk II. 6. Marksman Rifle Mk II ($149,000): superb semi-auto headshot machine for PvE grinders. 7. SMG Mk II ($85,500): the best drive-by gun, niche on foot. 8. Bullpup Rifle Mk II ($105,750): style pick, outclassed by other rifles. 9. Assault Rifle Mk II ($98,750): improved but still the weakest rifle family. 10. Heavy Revolver Mk II ($99,000): a fun 200-damage hand cannon, not a meta pick. 11. Pistol Mk II ($73,750): the AP Pistol makes it redundant. 12. SNS Pistol Mk II ($79,575): completionists only.

If you are starting out, buy in this order: Heavy Sniper Mk II, then Combat MG Mk II, then Special Carbine Mk II. Those three cover long range, sustained fire, and general mission work, and together cost $419,375 in conversions - roughly a third of converting everything for nearly all of the benefit.

Budget beyond conversions: the strongest unlocks are ammo types. Explosive rounds for the Heavy Sniper ($115,450), Explosive Slugs for the Pump Shotgun ($145,850), and armor piercing mags for your rifle and LMG all require Bunker research, which you can fast-track with cash. A realistic maxed essential-three build runs about $950,000 total.

Each weapon linked below has its own page with full cost breakdowns, verdicts, and recommended loadouts. Prices are verified against the Weapon Workshop tables and can shift with title updates, so treat figures as current as of July 2026.

Tips

You do not need Bunker research to convert a weapon to Mk II - only special ammo and certain attachments are research-locked.
Buy the Heavy Sniper Mk II first and research explosive rounds before anything else.
The essential three (Heavy Sniper, Combat MG, Special Carbine) cost $419,375 in conversions and cover every situation.
Fast-track research with cash if your Bunker is slow - the random research order rarely gives you what you want next.
You can revert any Mk II back to standard for free at the Weapon Workshop without losing the unlock.
Skip both Mk II pistols unless you are a completionist; the AP Pistol outperforms them for a fraction of the price.

FAQ

How many Mk II weapons are there in GTA Online?: Twelve: Pistol, SNS Pistol, Heavy Revolver, SMG, Combat MG, Assault Rifle, Carbine Rifle, Special Carbine, Bullpup Rifle, Pump Shotgun, Marksman Rifle, and Heavy Sniper Mk II. Converting all of them costs $1,300,700 as of July 2026.
Which Mk II weapons are worth buying in 2026?: Three are essential: Heavy Sniper Mk II ($165,375), Combat MG Mk II ($119,000), and Special Carbine Mk II ($135,000). The Pump Shotgun Mk II ($82,500) is the best budget add for its Explosive Slugs.
Do you need Bunker research to get Mk II weapons?: No - any Weapon Workshop converts a standard weapon to Mk II with no research. Bunker research (or a fast-track payment) is only needed for special ammo types like explosive rounds and for certain attachments.
How much does it cost to convert every weapon to Mk II?: $1,300,700 in conversion fees for all 12 weapons, as of July 2026. With base weapons, key attachments, and special ammo research, a full collection runs well past $3 million.

Video source: GTA Wiki (Fandom)

More GTA Weapons

Best Weapons in GTA Online

A curated list of the most effective weapons in GTA Online for combat, heists, and free roam, updated for 2026.

Cost: Varies; expect to spend over $1 million for all Mk II upgrades and ammo types

Heavy Sniper Mk II

The Heavy Sniper Mk II is the best weapon purchase in GTA Online - a $165,375 conversion (about $320,000 with explosive rounds) that one-shots players, helicopters, and most vehicles.

Cost: $165,375 (Mk II conversion at a Weapon Workshop)

Combat MG Mk II

The Combat MG Mk II costs $119,000 to convert (about $310,000 maxed) and is a must-buy - the best sustained-fire weapon in GTA Online for heists, setups, and business defense.

Cost: $119,000 (Mk II conversion at a Weapon Workshop)