GBU-28

American laser-guided bunker-buster bomb with a hardened penetrator casing, developed during the Gulf War to defeat deeply buried and hardened targets.

Compiled from public sources ·primary reference ↗ ·last verified 2026-07-05

Procurement snapshot

Availability & export

US ITAR-controlled

Export needs U.S. State Dept (DDTC) approval; end-use & re-transfer restrictions apply.

Channel: Foreign Military Sales (FMS) or Direct Commercial Sale

Fielded & proven

Operator data not public

Status: active.

Lifecycle cost (est.)

No public unit price to model from. Why so few systems publish one →

Interoperability

No standardised NATO calibre / datalink detected in public specs.

Derived guidance from public data, export regime by country of origin, lifecycle from the GAO ~30% acquisition rule. Verify eligibility, pricing and offsets with the manufacturer and your acquisition authority.

Full specifications

Firepower

Armament, payload and guidance.

Firepower specifications
Warhead Warhead mass. Heavier generally means larger effect radius, at the cost of range.	306 kg Stronger than 87% of munitions
Warhead type Blast-fragmentation, shaped charge (HEAT), penetrator, thermobaric or nuclear-capable.	Tritonal / AFX-757 penetrator
Guidance How the weapon finds its target: inertial, GPS/GLONASS, active/semi-active radar, infrared, laser, TV, wire.	Laser, GPS, INS

Physical

Dimensions, weight and crew.

Physical specifications
Length Overall length including gun/probe where applicable.	5.82 m
Width Overall width, matters for rail/road transport of vehicles.	0.38 m

Munition

Round type, penetration, velocity and projectile data.

Munition specifications
Round type APFSDS (kinetic sabot), HEAT / multipurpose, HE-FRAG, canister or gun-launched ATGM.	Laser-guided penetrator bomb
Penetration Published/estimated rolled-homogeneous-armour-equivalent penetration. Values are open-source estimates; real figures are classified.	6,000 mm RHA Top 1% of munitions
Projectile mass Mass of the projectile or penetrator assembly.	2,130 kg
Effective range Practical engagement range of the round.	30,500 m Stronger than 83% of munitions

Specifications compiled from public Raytheon (RTX) and reference sources ↗. Published defense figures are approximations, treat comparisons as directional. Last verified 2026-07-05.

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