[TACTICAL] Leitner-Wise LW15-499

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The Firearm Collection of Alejandro de Quesad...

By Fleischer's Auctions

Oct 20, 2026

Set Reminder 2026-10-20 10:00:00 2026-10-20 10:00:00 America/New_York Bidsquare Bidsquare : The Firearm Collection of Alejandro de Quesada, Jr. https://www.bidsquare.com/auctions/fleischers-auctions/the-firearm-collection-of-alejandro-de-quesada-jr-23376
Selections from the modern firearm collection of Alejandro de Quesada, Jr. Alejandro “Alex” de Quesada, Jr. (1965-2024) was a renowned author, historian, and consummate collector who built one of the militaria field’s most comprehensive private collections through decades of research and acquisition. Fleischer's Auctions info@fleischersauctions.com

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• Lot Description

  .499 Leitner-Wise. 16" barrel. SN: LW500042. Black anodized receiver with Parkerized steel components mounting fixed butt, checkered pistol grip, A2 pattern handguard, rail top receiver, KAC quad rail gas block, and ported muzzle brake. Gas impingement driven rotating bolt semi-automatic rifle fed by detachable box magazines. Markings on left receiver read LEITNER-WISE/RIFLE CO./ALEXANDRIA, VA/CAL. .499/MODEL LW15.499. Right receiver shows the Leitner Wise seal. Rifle mounts a Trijicon REFLEX II scope and nylon sling. Lacks the proprietary magazine.

   

  The .499 cartridge was developed by Leitner-Wise as a light anti-materiel weapon for the United States Coast Guard. The project failed to achieve acceptance or adoption, and the caliber has since been sidelined in favor of cartridges capable of fitting in STANAG size magazines and standard lowers, such as .458 SOCOM. A rare predecessor of current high-caliber AR pattern rifles developed in the hopes of securing a USCG contract. {FFL}

  Condition

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  Very Good Plus. Bore dirty with some firing residues near muzzle that should clean to Very Bright with sharp rifling throughout. Metal finish with some scattered light scratches and abrasions. Some oil residues throughout. Stock has some light handling marks. Scope is functional. Action functions when cycled by hand.

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