US has shifted to GPS- and laser-guided gravity bombs to conserve precision missile stocks

 

In the ongoing US-Iran war as of March 2026, the US has shifted to GPS- and laser-guided gravity bombs to conserve precision missile stocks after achieving air superiority over Iran.

� These "dumb" bombs, retrofitted with Boeing's Joint Direct Attack Munition (JDAM) kits, allow cheaper, high-volume strikes now that risks to aircraft are minimized.

�Key CharacteristicsGravity bombs in use include 500lb, 1,000lb, and 2,000lb variants dropped by USAF fighters like F-15Es and bombers (B-1B, B-2, B-52) under Operation Epic Fury. The JDAM kit adds steerable fins and GPS/laser guidance for precision from closer ranges, contrasting initial standoff munitions like Tomahawks.

� Pentagon officials, including Secretary Hegseth, describe stockpiles as "nearly unlimited," enabling intensified close-air support against Iranian missile sites, naval assets, and infrastructure.

�Strategic RoleThis transition supports "stand-in precision strikes" over Iran, with evidence from CENTCOM photos showing F-15E loadouts of four JDAMs each. It follows destruction of ~200 Iranian air defenses, reducing the need for long-range weapons amid falling Iranian retaliation (missile fire down 86%, drones 73%)

.� Israel coordinates similar tactics, amplifying effects on deeply buried targets like nuclear facilities.� 

22

The US shifted from cruise missiles to gravity bombs in the Iran war starting early March 2026 to conserve expensive precision-guided munitions (PGMs) after rapidly depleting stockpiles and achieving air dominance.

�Stockpile DepletionInitial strikes consumed thousands of Tomahawks, JASSMs, and JDAMs (each costing $1-2 million), with over 1,700 targets hit in the first week exhausting pre-positioned reserves. Pentagon briefings confirmed JDAM shortages, prompting a pivot to "cheaper, abundant" gravity bombs (under $30,000 with kits) for sustained operations.

�Air Superiority Achieved

Destruction of ~200 Iranian S-300/400 systems and radars allowed fighters (F-15E, F-16) and bombers (B-52s) to operate safely within 20km of targets, eliminating risks that mandated standoff cruise missiles earlier. Gravity bombs now enable precise, high-volume attacks on fixed sites like missile depots and naval bases.

�Cost and Volume Benefits-Gravity bombs with JDAM kits offer similar accuracy (CEP <10m) at 1/50th the cost, supporting "unlimited" sorties amid Iran's faltering defenses (missile barrages down 86%). This sustains momentum without production lags, as noted by Defense Secretary Hegseth.