directory/gunsmith
Heffron Precision
Heffron Precision Osage, IA
•Heffron Precision has been engineering performance-oriented revolver work since 1989. Located in Osage, Iowa, this is a family-operated gunsmithing business run by Mike Heffron (Master Pistolsmith/Revolversmith and Mechanical Engineer), his wife Tammy, and a team of highly skilled machinists they af...
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Business Details
Full description and what we offer
Heffron Precision has been engineering performance-oriented revolver work since 1989. Located in Osage, Iowa, this is a family-operated gunsmithing business run by Mike Heffron (Master Pistolsmith/Revolversmith and Mechanical Engineer), his wife Tammy, and a team of highly skilled machinists they affectionately call "The Wrecking Crew."
"We Specialize in Making Colt Revolvers the Best They Can Be!"
Heffron Precision doesn't engrave guns, refinish them, or build safe queens. They build Performance Kings—revolvers engineered for shooters who demand superior accuracy, trigger pulls, and function.
Every service is designed by a mechanical engineer, refined in AutoCAD, and prototyped through 120,000–150,000 dry fire cycles before being released to customers. Their approach is precision engineering, not guesswork.
Models they work on:
- •Old Series Double-Action Revolvers (1895–1995): Small frame, medium frame, large frame
- •Coil Spring Mechanism Revolvers (J Frame MKIII, V Frame MKV, AA Frame, MM Frame)
- •New Series Colt Revolvers (2017–present): All current Cobra, Python, King Cobra, Anaconda, and Grizzly models
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What they specialize in:
- •Custom trigger and action tuning
- •Blueprinted accuracy optimization
- •Mechanism repair and restoration
- •Parts fabrication and replacement
- •Performance enhancement engineering
All custom work is designed and executed using mechanical engineering principles. This is why Heffron revolvers deliver reference-standard performance that often exceeds high-dollar European imports like Korth, Manurhin, and Spohr.
Heffron Precision maintains inventory of quality used and custom firearms—all thoroughly inspected before sale. Recent listings have included:
| Firearm | Condition | Price |
|---|---|---|
| Colt Trooper MKIII .357 Mag | Refinished, action job | $390 |
| Colt Police Positive .22 LR | Retimed, new barrel | $350 |
| SIG Sauer SP2022 9mm | Excellent, proven reliability | $300 |
| Mauser/Interarms P-08 Luger 9mm | Superb, hand-fitted | $1,450 |
| 1930s Colt Officers Model .22 | Mechanically perfect | $750 |
| Colt Targetsman .22 | Excellent finish, John Browning design | $750 |
Payment: Credit card (add 3.5%), check, or money order Shipping: $75 via FedEx (Continental US only) Compliance: All firearms ship to Federal Firearms License holders only
Heffron Precision serves customers across the United States, South America, and Europe. They've tuned several thousand Colt revolvers and maintain a loyal following of competitors, collectors, and serious shooters who understand that superior performance requires superior engineering.
Downloadable training targets (right-handed and left-handed versions) to help shooters identify trigger control issues and develop better habits at the range.
Phone: 641-732-0050 Email: [email protected] Address: Osage, Iowa 50461
Phone Hours: - Monday, Wednesday, Thursday: 9:00 AM – 4:00 PM CST - Tuesday & Friday: Dedicated to shop work (email preferred)
To Order: Call or email with your phone number. First come, first served basis. No consignment, no returns on firearms.