On-Site Proof

Proof at your location

Supply Chain

Managing complexity

Expert Handling

Available to dealers

Military Firearm Proof

Experts in Military Firearm Proof

The London Proof House has assured the safety, reliability, and durability of firearms for the armed forces since before the English Civil War. Most recently for the MoD, keeping our personnel safe, in conflicts worldwide.

We have proved an enormous variety of weapons including service rifles, special forces weapons, weapons mounted on armoured vehicles and aircraft, and arms for both the Military and for other uniformed services.

We meet military proof standards

We work regularly across the MoD and for military focussed manufacturers. We adhere to all relevant Defence Standards.

We proof at your site

We can establish branch proof houses, or attend your facility, to Proof in the same way and with the same safety rigour as we would at the Proof House.


This includes custom cartridge creation, and the same safety rigour as the Proof House.

We integrate into complex supply chains

We routinely integrate into international supply chains that are time critical and high volume.


This includes proving guns abroad.

Army Trials Unit | MoD

Without the flexibility and dedication of the London Proof House, our support to the Ukrainian Armed Forces, via Op INTERFLEX, would have been delayed. Thank you so much for your support at this critical time.

World class systems for the MoD, Police, and NATO

"The Proof House in London have been exceptional with their customer support, response time and flexibility. There have been occasions when we required proving quickly, the Proof House never let us down and have provided a great service.


Having the relationship that we do with the Proof House has made a big difference, their speed, and sound communications by the Proof House has ensured that all our business requirements have been met on time and to a very high standard."

A Legacy of Excellence in Defence Engineering

"For more than 50 years, the London Proof House (LPH) has witnessed AEI Systems’ medium calibre weapon proof firings.


Throughout this time, AEI has received unwavering LPH assistance and support.

The end result is Customer assured weapons safety, quality engineering and design."

We test guns to MoD Defence Standards

We have nearly 400 years experience of proving military guns, both on-site, and at customer sites. We routinely work to military standards.

We are ISO 9001 Certified

ISO 9001:2015 is an international standard that specifies requirements for a quality management system (QMS). 


It is designed to help organisations ensure they meet customer and regulatory requirements while enhancing customer satisfaction. 

We are the oldest CIP Proof House

While the London Proof House adheres to many C.I.P. (Commission Internationale Permanente) standards for civilian proof, it also operates under the UK's Gun Barrel Proof act of 1868, which provides it with flexibility and independence in its military proof testing processes.

Gun Proof & Reproof

We proof guns for dealers, the military, precision target rifles, best gun makers, importers and auction houses.

Deactivation

We deactivate, and certify the deactivation of all kinds of firearms, adhering to the latest standards.

Gun Importing & Exporting

We proof all kinds of imported guns and with pre-booking provide a same day instant proof service.

Proof House Governance

A court with more than 800 years experience in the gun trade.

The Worshipful Company of Gunmakers

The Livery of the Worshipful Company of Gunmakers

The Certification Panel

The most experienced gunmakers in the UK certifying the next generation.

The McMillan Trophy

Awarded at the discretion of the Certification Panel for exceptional work.

The London Proof House is a Georgian building located in Whitechapel, and it is the historic home of British proof, inspection, ammunition control and deactivation of firearms.


The Proof House and its Proof Assistants work for the civilian, uniformed services and military sectors. All overseen by the Proof Master, the Master and Wardens, and Court of assistants, as defined by our Royal Charter granted on the 14th of March 1637 by King Charles the 1st during his reign.

Our Heritage