Israel Air Defense Explained: Iron Dome, David’s Sling and Arrow
Israel air defense explained: how Iron Dome, David’s Sling, Arrow and the Iron Beam laser split the work, what U.S. funding built and where limits lie.
TEL AVIV, Oct. 25, 2026 — When sirens sound in Israel, several separate systems decide which threats to engage and which to let fall in open ground. Iron Dome, David’s Sling and the Arrow family form a layered missile defense network built largely with U.S. funding, and a laser system called Iron Beam is joining them. This explainer covers how each Israel air defense layer works, what the record shows and where the limits lie.
Four layers, four altitudes
The Congressional Research Service report U.S. Foreign Aid to Israel describes “Israel’s four-layered active defense network”: Iron Dome for short range, David’s Sling for low to medium range, Arrow II for the upper atmosphere and Arrow III above it, outside the atmosphere. Each layer covers threats that the others are not optimized to stop.
Iron Dome: short-range rockets and mortars
Iron Dome, developed by Israel’s Rafael Advanced Defense Systems, intercepts rockets, mortars, artillery and drones at ranges of 2.5 to 43 miles, according to CRS. Each wheeled launcher carries 20 Tamir interceptors and works with a radar and a battle management center.
The system fires only at projectiles predicted to hit the area it protects, generally population centers and strategic sites. As a result, rockets heading for open ground are generally not engaged. Software makes split-second targeting decisions, CRS notes, while human operators oversee the system.
Iron Dome is also partly American-made. CRS says the U.S. share of co-production stood at 30% in 2023 testimony and that interceptor components are made at an RTX facility in Tucson, Arizona, among other sites. Rafael claims more than 5,000 successful interceptions and a success rate above 90%, the report says.
David’s Sling: the middle tier
David’s Sling targets long-range rockets and slower cruise missiles fired from 25 to 186 miles away, the kind held by Iran and Hezbollah, according to CRS. Rafael and RTX developed it jointly. Its Stunner interceptor is a “hit-to-kill” missile, more maneuverable and far more expensive per unit than Iron Dome’s Tamir, and each launcher holds up to 12. Israel declared the system operational in April 2017, and the United States has contributed more than $3.8 billion to its development since fiscal 2006.
Arrow: ballistic missiles from long range
The Arrow system, built by Israel Aerospace Industries with Boeing, counters long-range ballistic missiles like those Iran has fired at Israel. CRS says it became operational in 2000 and that total U.S. funding for all Arrow systems has exceeded $4.7 billion, just under half of annual development costs. Arrow III, which intercepts outside the atmosphere, has been operational since January 2017, and the two countries signed a co-production agreement for it in June 2019.
The next interceptor is already in development. The U.S. Missile Defense Agency announced in February 2021 that it and the Israel Missile Defense Organization had begun work on Arrow 4, which “will replace the Arrow 2 interceptors over the coming decades.”
Iron Beam: a laser layer
On Dec. 28, 2025, the Israel Ministry of Defense and Rafael delivered the first Iron Beam laser system to the Israel Defense Forces. Defense Minister Israel Katz said at the ceremony that “for the first time globally, a high-power laser interception system has achieved full operational maturity.” Congress included $1.2 billion for Iron Beam in an April 2024 supplemental law, according to CRS. Our report on a U.S. directed-energy counter-drone pilot covers similar American efforts.
The limits of the shield
No layer is airtight. A U.S. Military Academy analysis published by the Modern War Institute at West Point says Iron Dome’s reported intercept rate rose from about 85% in 2012 to roughly 90% in 2014 and 2021. On Oct. 7, 2023, however, Hamas launched between 2,200 and more than 3,000 rockets in about 20 minutes, which the authors say overwhelmed the system. That attack is remembered on our October 7 memorial page.
The 2026 war with Iran tested the upper layers. CRS reports in Israel: Major Issues and U.S. Relations that Israeli and U.S. defenses reportedly intercepted most Iranian projectiles judged to endanger civilians or key infrastructure. Some missiles and drones still got through, including one incident near the Dimona nuclear research center. Iran’s use of cluster munitions complicated the defense, as did fire from Hezbollah and the Houthis, and some open sources reported concerns about a potential scarcity of U.S.-funded interceptors.
What to watch
- Interceptor stocks: Production rates for Tamir, Stunner and Arrow interceptors after months of heavy use.
- Iron Beam deployment: How quickly additional laser units reach the field.
- Arrow 4: Progress toward replacing Arrow 2.
- U.S. funding: Missile defense money in the fiscal 2027 budget and in talks on aid after 2028.
Live developments on Israel’s fronts are tracked in the Iran War Tracker.
Sources
- Congressional Research Service: U.S. Foreign Aid to Israel (RL33222, May 28, 2025)
- Congressional Research Service: Israel: Major Issues and U.S. Relations (R44245, July 2, 2026)
- U.S. Missile Defense Agency: IMDO and MDA Begin Arrow 4 Development (Feb. 18, 2021)
- Israel Ministry of Defense: First operational Iron Beam laser system delivered to the IDF (Dec. 28, 2025)
- Modern War Institute at West Point: What Happened to Iron Dome?
