What is the PrSM missile that the US used for the first time in Iran? | Israel-Iran conflict News

The United States used Precision Strike Missiles (PrSMs) for the first time during its ongoing war with Iran, US Central Command (CENTCOM) said on Wednesday.

The war entered its seventh day on Friday, with attacks continuing across Iran and other countries in the Middle East.

CENTCOM stated in an X post that PrSMs provide an “unrivaled deep strike capability”.

“I just could not be prouder of our men and women in uniform leveraging innovation to create dilemmas for the enemy,” the post quoted Admiral Brad Cooper, head of CENTCOM.

It is unclear where these PrSMs were launched from, or which specific targets they hit in Iran.

So what is the PrSM, and why is it significant that it has been used by the US for the first time?

What are Precision Strike Missiles?

PrSMs are described as long-range precision strike missiles by their developer, the Maryland, US-headquartered defence firm Lockheed Martin, which delivered the first PrSMs to the US Army in December 2023.

PrSMs can hit targets ranging from 60km (37 miles) to more than 499km (310 miles) away, according to Lockheed Martin.

The company’s website adds that PrSMs are compatible with the MLRS M270 and HIMARS family of launchers, both also developed by Lockheed and used by both the United Kingdom and US armies.

MLRS stands for multiple-launch rocket systems, used to launch missiles. The UK sent a number to Ukraine in 2022. HIMARS stands for High Mobility Artillery Rocket System. In 2022, the US sent a number to Ukraine, as well.

M-142 HIMARS is a high-tech, lightweight rocket launcher that is wheel-mounted, giving it more agility and manoeuvrability on the battlefield. Each unit can carry six GPS-guided rockets, or larger missiles like Army Tactical Missile Systems (ATACMs) and PrSMs, which can be reloaded in about a minute with only a small crew.

Lockheed Martin adds that PrSMs can be rapidly developed. “We are ready to produce and deliver to meet the US Army’s accelerated timeline for this long-range precision fires priority,” the website says.

PrSMs feature “open systems architecture”, which means that it is easier to plug in new components, upgrade parts, or work with equipment from other companies. Similarly, they are “modular and easily adaptable”, enabling components to be switched around.

They also feature “IM energetic payload”, or Insensitive Munitions energetic payload, which makes explosions safer, the producer says. This means the warhead is made from explosives that are less likely to blow up accidentally if hit by fire, shrapnel or by accident, but still explode properly when triggered as intended.

What is different about the PrSMs?

PrSMs will ultimately replace the ATACMs currently being fired from the HIMARS launchers, significantly increasing their range from 300km (186 miles) to more than 499km (310 miles), without changing the vehicle carrying the missile.

PrSMs also offer double the “missile load” of ATACMs. While a HIMARS launcher is able to carry one ATACMS missile in its pod, it can carry two PrSMs per pod.

Does the PrSM give the US a strategic advantage?

CENTCOM confirmed that PrSMs have been used in the US and Israel’s attacks on Iran, codenamed Operation Epic Fury and launched on February 28.

CENTCOM posted a video of the PrSMs being launched from M142 High Mobility Artillery Rocket Systems in an open desert terrain.

PrSMs do give the US military a boost for its pre-existing long-range capabilities.

Gulf countries such as Kuwait, Saudi Arabia, Bahrain, Qatar, the United Arab Emirates and Oman, specifically the Musandam Peninsula, which have military bases hosting US assets and troops, have at least some territory within 400km (250 miles) of Iran.

The US is using PrSMs in conjunction with other long-range missiles such as Low-Cost Unmanned Combat Attack System (LUCAS) one-way drones, MQ-9 Reaper drones, ATACMs and Tomahawk Cruise Missiles.

The range for LUCAS one-way drones is about 800km (500 miles), while the range for ATACMs is about 300km (186 miles) and the range for Tomahawk cruise missiles is about 1,600km (1,000 miles).

Why is the introduction of the PrSM significant?

The range of this missile is significant as it is likely that it would not have been permitted under the Intermediate-Range Nuclear Forces (INF) Treaty with Russia, which the Trump administration withdrew the US from in 2019. This is because it can exceed the maximum 500km (310-mile) range the treaty imposed on certain land-launched missiles.

The treaty was signed in 1987 by US and Soviet Union leaders Ronald Reagan and Mikhail Gorbachev. It sought to eliminate the presence of land-based nuclear missiles and medium-range arsenals between 500km and 5,500km (310 and 3500 miles) from Europe.

The US suspension of the treaty allowed Washington to resume development of its own medium-range, land-based arsenal.

Following the US suspension, Russia invited the US to reciprocate in a unilateral moratorium on the deployment of ground-launched intermediate-range missiles instead. While Washington initially rejected the offer, in 2022, it said it would be willing to discuss this.

In August last year, the Russian Ministry of Foreign Affairs announced Russia’s withdrawal from this moratorium, however, saying the US had “made significant progress” and “openly declared plans to deploy US ground-launched INF-range missiles in various regions”. INF stands for intermediate-range nuclear forces.

The statement added that such actions by Western countries posed a “direct threat” to Moscow’s security.