South Union Street
a.k.a. South Union Street
Complex of converted warehouse buildings along South Union Street used by Interarms from the late 1950s to the late 1990s to store surplus military small arms. At peak the complex held hundreds of thousands of firearms.
- 1900approx
- Industrial
- Extant
- Old and Historic Alexandria District
Place narrative
The Interarms warehouse complex consisted of several separate brick industrial buildings along South Union Street south of the Alexandria waterfront, most built around the turn of the twentieth century for other industrial uses. Samuel Cummings Samuel Cummings b. 1927 · d. 1998 American-born, Monaco-based arms dealer who founded International Armament Corporation (Interarms) in 1953 and built its principal operations in Alexandria. At its peak Interarms … acquired the buildings incrementally beginning in the late 1950s as Interarms Interarms founded 1953 Alexandria-based arms dealership founded by Samuel Cummings in 1953, doing business as Interarms. For much of the Cold War the firm held one of the largest private inventories of … expanded, assembling a contiguous waterfront footprint at the south end of Union Street [1] Brogan & Zarca, Deadly Business, 1983 Book .
The buildings housed at various times surplus rifles (British Enfields, German Mausers, American M1 carbines), pistols, submachine guns, spare parts, and ammunition. The Brogan and Zarca biography describes inventories in the hundreds of thousands of firearms at peak and individual shipments moved from the warehouses to the adjacent pier for ocean transport. The complex attracted occasional attention from local neighbors concerned about the concentration of munitions at the waterfront and from federal regulators overseeing the import and export licenses that Interarms required [1] Brogan & Zarca, Deadly Business, 1983 Book .
Because this parent place covers several separate buildings at different addresses along South Union Street, sub-place entries for individual warehouses may be added to the data model later; for now the complex is represented as a single record with address-level detail deferred. A 1997 criminal case involving Cummings’s daughter, Susan Cummings, and the accidental-shooting prosecution that followed brought renewed media attention to the family name during the final years of the Alexandria operation, though it was unconnected to the waterfront business [2] Alexandria Library Special Collections Manuscript .
Interarms vacated the warehouses in stages in the late 1990s. Most of the buildings have since been converted to residential and commercial uses as part of the broader Strand Street Strand Street The Potomac waterfront from the Torpedo Factory south to Jones Point, subject to a decades-long redevelopment project that has converted former industrial and shipping frontage to … redevelopment.
Timeline
4 chronological entries across 2 eras.
- –
Samuel Cummings controlled the warehouse complex as part of the waterfront holdings of Interarms. [1] Source Brogan & Zarca, Deadly Business, 1983
- –
Interarms occupied the South Union Street warehouses from the late 1950s through the late 1990s, storing surplus military firearms. [1] Source Brogan & Zarca, Deadly Business, 1983
Interarms begins assembling the warehouse complex [1] Source Brogan & Zarca, Deadly Business, 1983
Interarms vacates the waterfront [2] Source Alexandria Library Special Collections
The building
- Industrial
Gallery

Secondary placeholder view of Interarms Warehouse Complex South Union. Seed placeholder — KingSt.com, 2026. To be replaced with archival photograph.
Connected
Interarms
founded 1953· dissolved 1999
Alexandria-based arms dealership founded by Samuel Cummings in 1953, doing business as Interarms. For much of the Cold War the firm held one of the largest private inventories of …
Operator · Warehouse · %!d(float64=1958)–%!d(float64=1999)
Samuel Cummings
b. 1927 · d. 1998
American-born, Monaco-based arms dealer who founded International Armament Corporation (Interarms) in 1953 and built its principal operations in Alexandria. At its peak Interarms …
Owner · Warehouse · %!d(float64=1958)–%!d(float64=1998)
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Now
No current occupant on file. Are you, or someone you know, the present occupant? Claim this place to add operating hours, a current photo, and a short note.
Union Street
Named for The federal union of American states, c. 1796.
Interpretive signs nearby
The City of Alexandria has installed 1 historical interpretive sign within walking distance of this place. Each links to the actual sign image on alexandriava.gov.
W side S. Union at entrance to Windmill Hill Park
Sources
- 1.
Patrick Brogan and Albert Zarca, Deadly Business: Sam Cummings, Interarms, and the Arms Trade, New York: W. W. Norton, 1983.
Book
- 2.
Alexandria Library, Local History/Special Collections, Barrett Branch, Alexandria, Virginia.
Manuscript
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