About

Fortnite's loot pool has exceeded 500 unique weapons across 30+ seasons, spanning categories from Assault Rifles to Mythic boss drops. Selecting a weapon at random for challenge runs, custom games, or content creation requires more than a coin flip. A naive uniform distribution ignores the fact that rarity tiers are not equally populated. A pool containing 40 Common items and 5 Mythic items will almost never surface a Mythic under uniform sampling. This generator implements weighted selection where probability P(w) is inversely proportional to the tier's population size, ensuring fair representation across rarities when desired.

Filters narrow the candidate pool before selection. If you restrict to Shotguns of Epic rarity or above, the algorithm only samples from that subset. The tool displays canonical stats including damage per shot, fire rate in rounds per second, magazine capacity, and derived DPS. Note: stat values reflect standard configurations and may differ from in-game values after balance patches. Use this for loadout challenges, tournament draft picks, or content brainstorming where manual selection introduces bias.

Formulas

The selection probability for each weapon w in the filtered candidate pool S is computed as follows. Under uniform mode, every weapon has equal probability:

P(w) = 1|S|

Under weighted mode, each rarity tier r is assigned a weight W_r. Common = 1, Uncommon = 2, Rare = 4, Epic = 8, Legendary = 16, Mythic = 32. The probability becomes:

P(w) = W_r(w)∑i ∈ S W_r(i)

Where r(w) returns the rarity tier of weapon w, and |S| is the cardinality of the filtered set. This ensures higher-rarity weapons surface more frequently when weighted mode is active, counteracting the natural skew of a Common-heavy loot pool. The selection uses cumulative distribution: a random value u ∈ [0, 1) is mapped to the CDF to pick the weapon.

Where: P(w) = probability of selecting weapon w. W_r = weight assigned to rarity tier r. S = filtered candidate weapon pool. u = uniformly distributed random variate from crypto.getRandomValues.

Reference Data

Weapon	Category	Rarity	Damage	Fire Rate	DPS	Mag Size	Reload s
AR (M16)	Assault Rifle	Common	29	5.5	159.5	30	2.3
SCAR	Assault Rifle	Legendary	36	5.5	198.0	30	2.1
Pump Shotgun	Shotgun	Uncommon	90	0.7	63.0	5	4.6
SPAS-12	Shotgun	Legendary	116	0.7	81.2	5	4.2
Tactical SMG	SMG	Rare	20	13.0	260.0	35	2.2
P90	SMG	Legendary	22	10.0	220.0	40	2.5
Bolt-Action Sniper	Sniper	Rare	105	0.33	34.7	1	3.0
Heavy Sniper	Sniper	Epic	132	0.33	43.6	1	4.3
Rocket Launcher	Explosive	Epic	110	0.75	82.5	1	3.4
Grenade Launcher	Explosive	Rare	100	1.0	100.0	6	3.0
Hand Cannon	Pistol	Epic	60	0.8	48.0	7	2.1
Suppressed Pistol	Pistol	Epic	32	6.75	216.0	16	1.5
Minigun	Assault Rifle	Legendary	21	12.0	252.0	∞	0
Hunting Rifle	Sniper	Uncommon	86	1.0	86.0	1	1.9
Drum Gun	Assault Rifle	Uncommon	26	9.0	234.0	50	3.3
Combat Shotgun	Shotgun	Epic	73	1.85	135.1	8	5.3
Tactical Shotgun	Shotgun	Rare	79	1.5	118.5	8	5.1
Infantry Rifle	Assault Rifle	Legendary	44	4.0	176.0	8	2.1
Boom Bow	Explosive	Mythic	115	1.0	115.0	1	1.3
Flint-Knock Pistol	Pistol	Common	86	0.33	28.4	1	3.2
Burst AR (AUG)	Assault Rifle	Epic	32	5.0	160.0	30	2.6
Revolver	Pistol	Common	54	0.9	48.6	6	2.4
Crossbow	Sniper	Rare	79	0.8	63.2	1	2.5
Mythic Goldfish	Throwable	Mythic	200	1.0	200.0	1	0

Frequently Asked Questions

Uniform selection gives every weapon in the filtered pool identical probability regardless of rarity. Weighted selection assigns exponentially increasing weights (Common = 1, Mythic = 32) so rarer weapons appear more frequently than their pool proportion would suggest. This is useful for challenge runs where you want a fair chance of getting high-tier weapons without manually filtering out commons.

Stats reflect canonical base values from each weapon's primary season of availability. Epic Games frequently adjusts damage, fire rate, and magazine size through patches. Treat displayed values as reference benchmarks. For tournament-accurate data, cross-reference with the current season's patch notes.

Yes. Set the "Quantity" slider to 5. The generator draws without replacement from the filtered pool, meaning you will not receive duplicate weapons in a single roll. If the filtered pool contains fewer weapons than the requested quantity, the tool will warn you and generate the maximum available.

DPS equals damage per shot multiplied by fire rate in rounds per second. Bolt-action snipers deal over 100 damage but fire at 0.33 rounds/second, yielding roughly 34 DPS. Conversely, the Tactical SMG deals 20 damage but fires at 13 rounds/second for 260 DPS. DPS is a sustained-fire metric and does not account for burst damage, headshot multipliers, or build-breaking capability.

The generator uses the Web Crypto API (crypto.getRandomValues) which provides cryptographically secure pseudorandom numbers. This is substantially higher quality than Math.random() which uses a simple PRNG. For weapon selection purposes this exceeds any fairness requirement.

Filters are applied as a logical AND chain. If you select "Shotgun" category and "Legendary" rarity, only weapons matching both criteria enter the candidate pool. If no weapons match the combined filter, the tool displays an empty-pool warning rather than silently relaxing constraints.