Nighthawk Custom Korth Mongoose 6″ (.357 Magnum) — Used Price & Value 2026 | GunPrice Value Guide

Nighthawk Custom Korth Mongoose 6"

.357 Magnum·Used Price & Value Guide 2026

About the Nighthawk Custom Korth Mongoose 6"

The Nighthawk Custom Korth Mongoose 6" in .357 Magnum is a rifle from Nighthawk Custom — Berryville, Arkansas custom 1911 shop building one-gunsmith-per-pistol. Within the catalog this configuration serves deer (close range), defensive, hunting handguns, and its 2026 used-market position is supported by an active dealer network, available parts, and a stable supply of buyers willing to transact at the price bands documented below.

Brief History & Lineage

Nighthawk Custom was founded in 2004 in Berryville, Arkansas. The ‘one gun, one gunsmith’ shop philosophy and premium pricing put Nighthawk in the upper tier of American 1911 makers alongside Wilson Combat and Cabot. Within the catalog, Nighthawk Custom positions itself among peers including Wilson Combat, Cabot Guns, Les Baer.

Specifications

• Caliber: .357 Magnum
• Action: Rifle
• Year of manufacture: varies — see Year-of-Manufacture Notes below

Variant & Year-of-Manufacture Notes

The Nighthawk Custom Korth Mongoose 6" has been offered across multiple production years with variation in stock material, finish, and barrel length. Early-production examples typically command a modest premium over late-production guns of the same configuration. Watch for aftermarket modifications — refinishes, drilled-and-tapped receivers on classic pieces, replacement stocks, and trigger swaps — all of which can shift used value. Original-condition examples with matching serials, factory boxes, and manuals trade at the top of the range for the model.

Ammunition & Shooting Notes

The .357 Magnum is used for deer (close range), defensive, hunting handguns. 125gr-180gr loads available; chambers also accept the lower-pressure .38 special. Modern factory loads from American, European, and Asian manufacturers all run well in this platform, and reloaders enjoy a wide range of bullet and powder combinations.

How It Compares

The Nighthawk Custom Korth Mongoose 6" occupies a market position comparable to offerings from Wilson Combat, Cabot Guns, and Les Baer. Buyers cross-shopping these brands typically prioritize premium-1911 collectors — and once they’ve committed to Nighthawk Custom, brand loyalty tends to be strong because of dealer network and parts availability. Used-market resale for a comparable-condition gun from these peer brands trades within roughly ±15% of the Nighthawk Custom Korth Mongoose 6" depending on the specific variant and year.

What’s a Used Nighthawk Custom Korth Mongoose 6" Worth?

Private-sale ranges for a working, no-rust Korth Mongoose 6" in 2026 fall in four bands:

• Beater / heavily used: $350–$525 — significant wear, action functional, may need cleaning or minor service
• Average / honest used: $475–$725 — normal handling marks, mechanically sound, ready to shoot
• Excellent / lightly used: $650–$1000 — minimal wear, clean bore, original box and paperwork a plus
• New-in-box or unfired: $825–$1300 — at this price, the calculation usually flips toward buying new instead

Add a premium for documented early-production examples, original box and accessories, or limited-run variants. Subtract for refinished surfaces, aftermarket modifications a buyer would have to reverse, or signs of hard use.

Who Buys It?

The typical Nighthawk Custom buyer profile includes premium-1911 collectors, hard-use pistol buyers, Korth-revolver shoppers. The rifle format and the .357 Magnum chambering further focus the audience. Used-market liquidity is solid — list a clean example at fair market on GunBroker, Armslist, or a local board and it generally moves inside two to three weeks. Dealer trade-in offers typically run 20–30% below private-sale; if you have time to list, private sale captures the premium.

Frequently Asked Questions

Is the Nighthawk Custom Korth Mongoose 6" still in production?

Production status changes — check Nighthawk Custom’s current catalog for active SKUs. If discontinued, used-market supply is the only source, and that can drive prices up for clean examples.

What’s the best ammunition for the Korth Mongoose 6"?

For general-purpose use, factory loads in .357 Magnum from the major American and European makers are the safe choice. Match shooters and hunters should select bullet weight and construction to the intended task.

Does year of manufacture matter for value?

Yes, to a degree. Early-production Korth Mongoose 6" examples often command a small premium for collector interest, and pre-discontinuation variants can also trade higher. Mid-production years generally trade at the base ranges shown above.

What’s the resale outlook compared to Wilson Combat alternatives?

Both Nighthawk Custom and Wilson Combat retain solid resale value in their respective segments. Within ±15%, the two trade comparably in clean condition. The Nighthawk Custom Korth Mongoose 6" typically pulls ahead with collectors who specifically want this brand.