Dave Manson Precision Reamers

What Dave Manson Precision Reamers does

Manson Precision Reamers is a privately held U.S. precision tooling manufacturer founded in 1998 by Dave Manson and headquartered in Grand Blanc, Michigan. The company designs, manufactures, and sells chamber reamers, headspace gauges, muzzle crowning kits, cutting tools, and complementary gunsmithing accessories (including a newly launched MXG scope ring line and Manson Barrel Vise) under the Manson Precision Reamers and Manson Reamers brands, with all manufacturing performed in-house in Michigan. Its core technology spans high-speed steel (HSS) and carbide cutting tools with optional TiCN coating, supported by ISO 17025 and A2LA accredited metrology with NIST-traceable calibration records, and a custom reamer design service for wildcat and proprietary cartridges with 8-10 week lead times.

Manson serves a diversified customer base spanning large firearms OEMs (Colt, Savage, Smith & Wesson, Ruger, Mossberg, Remington, Kimber, Springfield Armory, Staccato, Henry), ammunition manufacturers (Hornady, Winchester Ammunition), defense firms (Cadex Defence), custom rifle builders, gunsmithing schools, and individual hobbyists. Revenue is generated primarily through one-time unit sales across a catalog of 765+ products priced from $14.99 (cutting oil) to $975 (muzzle crowning kits), with premium custom reamer orders at higher price points. The business operates a direct-to-consumer e-commerce model (MansonReamers.com) supplemented by direct phone and email sales, supported by a community-led growth motion anchored on 9 professional brand ambassadors and an Official Partnership with the Precision Rifle Series for 2026. Distribution is global with shipping restrictions to certain sanctioned nations.

Name

Dave Manson Precision Reamers

Legal name

Manson Precision Reamers

Website

https://mansonreamers.com

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

1–10 employees

Short description

Manson Precision Reamers, founded 1998 and based in Grand Blanc, Michigan, manufactures precision chamber reamers, headspace gauges, and gunsmithing cutting tools for U.S. firearms OEMs (Colt, Ruger, Hornady), custom builders, schools, and hobbyists, selling directly via its e-commerce storefront with ISO 17025 accredited metrology.

Ownership category

akta.pro rank

Headquarters

HQ city

Grand Blanc

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Standard Product Sales: Sale of standard catalog chamber reamers, headspace gauges, cutting tools, muzzle crowning kits, barrel vises, accessories, and pilot bushings through the e-commerce storefront. Products are shipped in-stock within 1 business day. Over 765 products in the catalog across multiple categories.
2. Custom/Made-to-Order Reamer Sales: Custom reamer orders for wildcat cartridges, proprietary specifications, and special orders. Made-to-order lead time approximately 2-3 months; fully custom approximately 8-10 weeks. Includes options for rougher, finisher, various gauge types, pilots, TiCN coating, and oil grooves.
3. Digital Gift Certificates: Digital gift certificates sold in denominations from $20 to $1,000, delivered by email to purchaser or recipient. Redeemable against all products on MansonReamers.com.
4. Apparel and Merchandise: Sale of branded apparel including the Manson USA 250th Anniversary T-Shirt and other merchandise. Limited edition items and promotional giveaways tied to purchase thresholds (e.g., free t-shirt on orders over $250).

Pricing tiers

Go-to-market motion4 records

Distribution channels3 records

Marketing channels8 records

Core offering

Dave Manson Precision Reamers manufactures and sells precision chamber reamers and headspace gauges used to cut and verify the chamber geometry of firearm barrels. The company offers a catalog of 765+ products including standard HSS reamers, new carbide reamers, headspace gauges (GO/NO-GO/FIELD), muzzle crowning kits, cutting tools, scope rings, barrel vises, and a custom reamer design service for wildcat and proprietary cartridges. All products are manufactured in-house at the Grand Blanc, MI facility with ISO 17025 / NIST-traceable metrology.

Product overview

Manson Precision Reamers is the country's premier supplier of precision chamber reamers, headspace gauges, and gunsmithing cutting tools for rifles, shotguns, and handguns, operating since 1998. The product portfolio centers on chamber reamers (HSS and Carbide varieties) and matched headspace gauge sets, complemented by muzzle crowning kits, cutting tools, shotgun tooling, receiver truing tools, scope rings, barrel vises, and accessories. The company offers a specialized PRS Collection for Precision Rifle Series competitors, custom reamer design services for wildcats and proprietary calibers, and branded consumables like Chamber Magic cutting oil. Products are manufactured in Grand Blanc, MI with ISO 17025-calibrated metrology and NIST-traceable standards.

Differentiator

Problem solved

Functional benefit

Brands

• PRS Collection: Precision Rifle Series branded reamers and gauges designed for competitive long-range shooting disciplines.
• MXG Series Scope Rings

Products and services

• Carbide Chamber Reamers Premium chamber reamers with carbide cutting edges offering extended tool life and dimensional stability for high-volume gunsmithing and OEM production. Available in 15 calibers with Rougher and Finisher configurations and Solid or Removable Pilot options.
• Standard High-Speed Steel (HSS) Chamber Reamers High-speed steel chamber reamers available in Rimless, Rimmed, Belted, Ackley Improved, Weatherby, Rimfire, Rimless Pistol, and Rimmed Pistol calibers. Configurable as Rougher or Finisher with Solid or Removable Pilot options and optional TiCN coating.
• PRS Collection Chamber Reamers and Gauges Match-grade chamber reamers and headspace gauges engineered for PRS competition, covering leading long-range cartridges. Available in Rougher and Finisher configurations with Solid or Removable Pilot options.
• Headspace Gauges (GO, NO-GO, FIELD) Precision headspace gauges for verifying chamber dimensions in GO, NO-GO, and FIELD configurations across all calibers in the reamer catalog including Ackley Improved, Belted, Rimfire, Rimless, and Rimmed varieties. Each gauge verified by ISO 17025 / A2LA accredited third-party calibration with NIST-traceable records.
• Muzzle Crowning Tool Kit Precision muzzle crowning system for refinishing or creating muzzles on rifle barrels. Kits include 0 DEG and 11 DEG cutters, manual driver, pilots, user manual, protective case, and hardware. Optional deburring cutter add-on.
• Manson Barrel Vise Heavy-duty barrel vise for gunsmithing work handling barrels from 0.775 to 1.375 inch outside diameter. Top piece hardcoat anodized aluminum; bottom powder coated. Includes two leather strips. Priced at $109.99.
• MXG Series Uni-Mount Scope Rings Uni-mount scope ring system (Manson Xtreme Game) precision bored in a single inline operation for perfect matching. Available in 30MM and 34MM diameters with Low and High heights. Aerospace-grade 7075 aluminum with MIL-A-8625 Type III hard coat anodization. Integrated forward Picatinny rail. 8 oz total weight. Priced at $349.99 per set.
• Cutting Tools Gunsmithing cutting tools including Cylinder De-Leading Tools, Cylinder Throating Reamers, Headspace Reamers (Pull Through), Muzzle Brake Reamers, Neck and Throaters, Neck Sizers, Scope Ring Alignment Reamers, Specialized Cutters, and Throaters.
• Shotgun Tooling Specialized shotgun gunsmithing tools including Barrel Wall Thickness Gauges, Long Forcing Cone Reamers, Screw-In Choke Tooling, Shotgun Bore Reamers, Shotgun Chambering Reamers, Shotgun Headspace Gauges, and Shotgun Muzzle Facing Cutters.
• Receiver Truing Tools Precision tools for accurizing and truing receiver surfaces including Bolt Face Truing Kits, Accurizing and Receiver Truing Tooling, Action Indicating tools, and Additional Receiver Truing Tooling for Remington 700 and Winchester Model 70.
• Pilot Bushings Interchangeable pilot bushings for removable pilot reamer setups. Available in Cylinder Pilot Bushings Packs (6 varieties), Shotgun Pilot Bushings (6 varieties), and Standard Pilot Bushings (22 varieties) to match various barrel bore diameters.
• Accessories and Tools Gunsmithing accessories including Cartridge Comparators, Floating Reamer Holders, Gritters-Type Indicating Rods, Gun Cleaning products, Muzzle Centering Plugs, Reamer Stops, Reamer Storage, Rigid Reamer Holders, T-Handles, and Microfiber Towels.
• Chamber Magic Cutting Oil High-performing synthetic cutting oil specifically crafted for chambering barrels, engineered for extreme pressures and tight tolerances in precision gunsmithing and tool-and-die work.
• Custom Reamer Design Service Custom reamer design and manufacturing service for wildcats, proprietary cartridges, and custom chamber specifications. Customers submit specs via an online design form. Lead time approximately 8-10 weeks. Each custom reamer order comes with a free solid-wood protective case and 50% off NO-GO gauge when ordered with a special reamer and GO gauge.

Quantifiable outcome

• Hornady replaced all in-house headspace gauging with Manson gauges at end of 2025, eliminating supplier variation and ensuring consistency across their ammunition production
• +4 more outcomes

Named customers29 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

13 partnerships are on record, tiered core and minor.

• Precision Rifle Series (PRS)coreGTM or Marketing Partner · 1 January 2026For the 2026 season, Manson Precision Reamers is the Official Reamer and Headspace Gauge of the Precision Rifle Series — the preeminent competitive precision rifle organization in the world. The PRS structures yearly points races across the Pro Bolt Gun Series and PRS Regional Series. The partnership recognizes Manson's tooling as the standard for match-grade chamber work at the highest level of precision rifle competition. PRS published a feature article on their official blog titled 'Where Accuracy Begins: Inside Manson Precision Reamers' by Megan Egyed.
• HornadycoreStrategic or Co-development Partner · 1 January 2025Manson and Hornady have worked together for nearly a decade. At the end of 2025, Hornady replaced all of their in-house headspace gauging with Manson gauges. Hornady wanted to eliminate variation between suppliers and ensure confidence and consistency. Every piece of metrology at Manson is verified by a third-party ISO 17025 and A2LA accredited calibration company with NIST-traceable records. Hornady's decision to trust Manson with their headspace standards is described as a 'tremendous vote of confidence in our quality standards.'
• Cadex DefencecoreStrategic or Co-development Partner · 1 January 2025Manson has served as a tooling supplier to Cadex for nearly two decades. In 2025, Manson partnered with Cadex to produce chamber reamers and headspace gauges for both the 14.5X114 and the 12.7X114 — one of the largest and most significant projects in Manson's history, demanding absolute focus on scale, precision requirements, and performance expectations. The 14.5X114 was displayed at SHOT Show 2026. The relationship is described as built on 'consistency, delivering tools that perform exactly as expected, every time.'
• Colt ManufacturingminorOthersColt Manufacturing is listed as a client/customer of Manson Precision Reamers, alongside other major firearms manufacturers including Savage, Smith & Wesson, Henry, Winchester Ammunition, Mossberg, Kimber, Remington, Ruger, Springfield Armory, Staccato, and Brownells.
• Savage ArmsminorOthersSavage Arms is listed as a client/customer of Manson Precision Reamers.
• Smith & WessonminorOthersSmith & Wesson is listed as a client/customer of Manson Precision Reamers.
• Winchester AmmunitionminorOthersWinchester Ammunition is listed as a client/customer of Manson Precision Reamers.
• MossbergminorOthersMossberg is listed as a client/customer of Manson Precision Reamers.
• Ruger FirearmsminorOthersRuger Firearms is listed as a client/customer of Manson Precision Reamers.
• BrownellsminorChannel Partner/ Reseller/ DistributorBrownells is listed as a client/customer of Manson Precision Reamers. Brownells is a major firearms parts and tools distributor serving gunsmiths and firearm enthusiasts.
• American Gunsmithing InstituteminorOthersAmerican Gunsmithing Institute is listed as a client/customer of Manson Precision Reamers, alongside other gunsmithing schools including Colorado School of Trades, Pennsylvania Gunsmith School, Montgomery Community College, Lassen Community College, Pine Tech Community College, and Yavapai College Gunsmithing.
• Pennsylvania Gunsmith SchoolminorOthersPennsylvania Gunsmith School is listed as a client/customer of Manson Precision Reamers for gunsmithing education and training.
• Second Amendment FoundationminorOthersA portion of proceeds from Chamber Magic Cutting Oil sales are donated to the Second Amendment Foundation (SAF) at saf.org.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Others

• Hornady: Major ammunition manufacturer and Manson's most strategic customer (consolidated all in-house headspace gauging onto Manson in 2025). Relevant as a buyer relationship rather than a direct competitor, but adjacent in precision gauge expertise.
• Cadex Defence: Long-standing Manson OEM customer (~20 years) for sniper/anti-materiel rifle programs (14.5x114, 12.7x114). Customer/partner relationship rather than competitor, but informs Manson's high-end custom chambering capabilities.

Direct peers

• Pacific Tool & Gauge: Direct competitor in precision chamber reamers, headspace gauges, and custom rifle tooling. PTG serves many of the same OEM and custom rifle builder segments as Manson, with overlapping caliber coverage and custom reamer design services.
• Forster Products: Direct peer producing precision reamers, headspace gauges, and case-trimming tools for the firearms and reloading industry. Competes with Manson in both benchrest/precision rifle tooling and gunsmith consumables.
• Clymer Manufacturing: Long-established direct peer in chamber reamers and gunsmithing tooling. Clymer competes head-to-head in HSS reamers, headspace gauges, and custom chamber work for rifle builders.
• JGS Precision Tooling: Specialized direct peer focused on precision rifle reamers, gauges, and custom chambering tools for benchrest, F-Class, and tactical/competitive shooters — overlapping Manson's PRS Collection offering.

Broad incumbents

• Brownells: Largest U.S. firearms parts, tools, and supplies distributor — both a Manson channel partner and a competitor via its own branded reamers, gauges, and gunsmithing tools.
• Sinclair International: Broader gunsmithing/reloading tools distributor and manufacturer offering reamers, headspace gauges, and barrel-fitting tools. Overlaps with Manson on gauge and reamer SKUs but operates as a wider-portfolio vendor.
• Wilson Combat: Custom 1911 and AR-platform firearms maker that also sells branded precision reamers and gunsmithing tooling. Competes with Manson in select chambering tools while serving similar high-end custom shops.

Regional players

• Midway USA: Major U.S. firearms and reloading retailer/distributor carrying competing branded reamers, gauges, and gunsmithing tools. Provides shelf competition to Manson tools and serves overlapping U.S. gunsmith/end-user customers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/MansonPrecision
• LinkedInlinkedin.com/company/manson-precision-reamers
• Instagraminstagram.com/mansonprecisionreamers

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Dave Manson Precision Reamers