CNC Milling
Multi-axis CNC milling for complex firearms components—receivers, frames, and housings—with 3-, 4-, and 5-axis capability, tight tolerances, and repeatable accuracy across every production run.
When tolerances are measured in ten-thousandths of an inch and reliability is non-negotiable, Criterion Precision Machining delivers. Since 1953, we've produced mission-critical firearms components—triggers, bolt carriers, barrels, and more—using advanced CNC milling, turning, and Swiss turning technologies. ISO 9001 certified and ITAR registered, we machine to spec the first time, every time.

End-to-end precision machining solutions for firearms components—from prototype to full-volume production with certified quality at every step.
Multi-axis CNC milling for complex firearms components—receivers, frames, and housings—with 3-, 4-, and 5-axis capability, tight tolerances, and repeatable accuracy across every production run.
High-precision CNC turning for cylindrical firearms parts such as barrels and pins, holding tolerances down to ±.0002" in titanium, stainless steel, and specialty alloys.
Swiss turning for small, intricate firearms components—pins, springs, and micro-features—with diameters as small as .010" and exceptional surface finishes on difficult materials.
Production-intent firearms component prototyping machined on the same equipment as final parts, providing real-world performance data and a seamless path to high-volume production.
Certified quality inspection using CMM, OASIS optical systems, and Keyence measurement tools to verify every firearms component meets drawing and compliance requirements before shipment.
Proven experience machining firearms-grade materials including 4140 steel, stainless steel, titanium, aluminum, and specialty alloys to exacting dimensional and surface finish standards.
Firearms demand zero tolerance for error—a standard Criterion Precision Machining has upheld since 1953. Operating from Brook Park, Ohio, and serving defense and firearms OEMs across the United States, we apply our Swiss turning, CNC turning, and 5-axis CNC milling capabilities to produce triggers, bolt carriers, barrels, housings, and complex subassemblies. ISO 9001 certified and ITAR registered, every component is inspected against drawing with our Global Advantage CMM and OASIS optical systems, so you receive parts that function flawlessly in the field.

Seven decades of precision machining expertise, advanced equipment, and certified quality systems set Criterion apart for firearms component production.
Fully ITAR registered and compliant, ensuring secure, lawful machining of controlled firearms and defense components for U.S. manufacturers.
We hold tolerances down to ±.0002", delivering the dimensional precision firearms mechanisms demand without exception.
ISO 9001 certified quality management system with CMM, OASIS optical inspection, and Keyence measurement—zero-defect delivery you can count on.
Founded in 1953 and now in its third generation of ownership, Criterion brings deep Ohio manufacturing heritage to every firearms component order.
Experienced professionals committed to precision, quality, and on-time delivery.

President
As third-generation owner and President of Criterion Precision Machining, Tanya DiSalvo leads our commitment to delivering mission-critical components for Texas railroad infrastructure. Under her leadership, Criterion has evolved into a woman-owned precision machining company specializing in the 'No Failure' sectors, including railroad safety systems. Tanya's vision has guided the company's investment in advanced CNC technology and ISO certification programs, ensuring our Texas railroad clients receive components that meet the most stringent safety and performance standards. Her dedication to quality excellence and operational efficiency has positioned Criterion as a trusted partner for railroad manufacturers requiring precision components that perform reliably across Texas's diverse operating environments, from Gulf Coast humidity to West Texas desert conditions.

Quality Manager
Kelly Marflak serves as Quality Manager at Criterion Precision Machining, overseeing our comprehensive quality assurance programs critical to railroad component manufacturing. With deep expertise in precision inspection protocols, Kelly manages our certified Quality Assurance program that includes multiple points of precision inspection built into manufacturing processes. She oversees the operation of our Global Advantage CMM with PC-DMIS software, OASIS Optical Automatic Smart Inspection System, and Keyence measuring systems capable of measuring up to 99 dimensions simultaneously. Kelly's meticulous attention to detail ensures every railroad component meets the exacting tolerances and safety standards required for Texas railroad applications. Her leadership in quality control processes has been instrumental in maintaining our ISO 13485 and ISO 9001 certifications, providing railroad manufacturers with the documentation and compliance verification essential for safety-critical components operating across Texas's extensive rail network.

Estimator/Project Manager
Mike Pinchot brings extensive project management expertise to Criterion's railroad machining operations as Estimator and Project Manager. With deep understanding of precision manufacturing requirements, Mike works closely with Texas railroad clients to develop accurate project estimates and manage complex machining programs from concept through delivery. His technical expertise enables him to assess challenging railroad component specifications and coordinate multi-axis machining operations, Swiss turning processes, and quality inspection requirements. Mike's project management approach ensures railroad components are delivered on time and within budget while meeting the stringent quality standards required for safety-critical applications. His collaborative work with engineering teams and manufacturing personnel has streamlined processes for producing complex railroad parts, from prototype development through full production runs, ensuring Texas railroad infrastructure receives components manufactured to the highest precision standards.

Chief Financial Officer
David Glass serves as Chief Financial Officer at Criterion Precision Machining, bringing strategic financial leadership to support our continued growth and investment in advanced manufacturing capabilities. With his comprehensive understanding of manufacturing economics and operational efficiency, David ensures that our precision machining operations remain competitive while maintaining the highest quality standards. His financial expertise enables Criterion to make strategic investments in cutting-edge CNC equipment, quality systems, and workforce development that directly benefit our clients in mission-critical industries. David's analytical approach to business management helps optimize our manufacturing processes and resource allocation, ensuring we can deliver exceptional value to customers while maintaining the financial stability necessary for long-term partnerships. His commitment to operational excellence supports our ability to serve the demanding requirements of medical device, aerospace, defense, and photonics manufacturers who rely on our precision machining capabilities.

Internal Systems Manager
Kellyanne Gottschalk serves as Internal Systems Manager at Criterion Precision Machining, responsible for managing and optimizing the company's operational and business systems, including the ProShop ERP platform. Her role is critical in ensuring seamless workflow from order intake to final delivery, enabling real-time visibility into production scheduling, quality documentation, and compliance tracking. Kellyanne's expertise in systems management supports Criterion's ability to scale efficiently while maintaining the rigorous documentation and traceability standards required by regulated industries such as medical devices and aerospace. Her work underpins the company's operational excellence and helps ensure every project is delivered on time and in full compliance.

Customer Service
Nilda Feliciano is the Customer Service representative at Criterion Precision Machining, serving as a dedicated point of contact for clients throughout the entire order lifecycle. From initial inquiries to order updates and delivery coordination, Nilda ensures that every client receives responsive, clear, and professional communication. Her commitment to customer satisfaction reflects Criterion's values of reliability and partnership, particularly important for clients in time-sensitive industries like aerospace, defense, and medical devices. Nilda's friendly and knowledgeable approach helps build lasting relationships with customers, ensuring they feel supported and informed at every stage of their project with Criterion.

Office Administrator
Bonnie Paletta serves as Office Administrator at Criterion Precision Machining, keeping the day-to-day operations of the business running smoothly. Her organizational skills and attention to detail ensure that administrative processes, documentation, and internal coordination are handled efficiently, freeing up the production and quality teams to focus on delivering precision components. Bonnie is a vital part of the Criterion team, contributing to the company's culture of professionalism and reliability. Her support role touches every department, helping to maintain the high standards of communication and organization that Criterion's clients in medical device, aerospace, and defense industries depend on.
Yes. Criterion Precision Machining produces precision firearms components using CNC milling (3-, 4-, and 5-axis), CNC turning, and Swiss turning. We machine triggers, bolt carriers, barrels, housings, pins, and complex subassemblies to tight tolerances down to ±.0002" in steel, stainless steel, titanium, aluminum, and specialty alloys.
Talk to our engineering and estimating team for a free consultation on your firearms component project.
Criterion Precision Machining serves firearms OEMs and defense contractors across the entire United States from our Brook Park, Ohio facility.
Nationwide U.S.
Service Area
Brook Park, Ohio
Headquarters
Since 1953
In Business
We ship precision firearms components to defense and firearms manufacturers across the U.S. Contact us to confirm we can support your project.
Internationally recognized quality management system certification.
Registered with the U.S. State Department for controlled defense components.
Nationally certified Women's Business Enterprise by WBENC.
Share your drawings and specifications and our team will respond with a detailed quote. No-charge Certificates of Conformance and inspection reports are included with every order.
For immediate assistance, feel free to give us a direct call at 216-267-1733. You can also send us a quick email at office@criteriontool.com.
For immediate assistance, feel free to give us a direct call at 216-267-1733. You can also send us a quick email at office@criteriontool.com.