INDUSTRY COMPONENT

Barrel Extension Interface

A precision-machined interface component that connects barrel extensions to firearm receivers, ensuring proper alignment and secure attachment.

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Component Specifications

Definition
The Barrel Extension Interface is a critical mechanical component in firearm receivers that provides the mounting surface and alignment features for attaching barrel extensions. It ensures precise concentric alignment between the barrel extension and receiver, maintains headspace control, and transfers firing forces from the barrel assembly to the receiver structure. This interface typically includes threaded connections, indexing pins, and mating surfaces that must maintain tight tolerances for reliable firearm function.
Working Principle
The interface operates on mechanical attachment principles, using precision threads and alignment features to create a rigid connection between the barrel extension and receiver. It maintains proper headspace by controlling the distance between the bolt face and chamber, while transferring recoil forces through the receiver structure. The design ensures repeatable alignment during barrel changes or maintenance.
Materials
4140 or 4150 chromoly steel, heat-treated to RC 28-32; Alternative: 8620 steel case-hardened; Surface treatment: Nitride or phosphate coating for corrosion resistance
Technical Parameters
  • Hardness RC 28-32 core, RC 60+ surface for nitride
  • Thread Pitch 1.0625-16 UNEF or metric equivalent
  • Surface Finish 32 Ra or better on mating surfaces
  • Thread Engagement Minimum 1.5 times diameter
  • Index Pin Diameter 0.154" ±0.0005"
  • Squareness to Bore 0.0005" per inch maximum
  • Concentricity Tolerance 0.001" TIR maximum
Standards
ISO 9001, SAE J429, MIL-S-5000

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Barrel Extension Interface.

barrel extension interface firearm receiver component barrel mounting headspace control precision machining firearm parts receiver interface barrel attachment Barrel Extension Interface in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Receiver

The central structural component of a tactical semi-automatic rifle that houses the firing mechanism and provides mounting points for other components.

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Engineering Analysis

Risks & Mitigation
  • Improper installation leading to headspace issues
  • Thread damage from cross-threading
  • Material fatigue from repeated disassembly
  • Corrosion in mating surfaces
FMEA Triads
Trigger: Incorrect torque application during installation
Failure: Thread stripping or improper headspace
Mitigation: Use calibrated torque wrenches and follow manufacturer specifications precisely
Trigger: Contamination in thread engagement area
Failure: False torque readings and improper seating
Mitigation: Thorough cleaning before assembly and use of appropriate lubricants
Trigger: Material defects or improper heat treatment
Failure: Cracking or deformation under firing stresses
Mitigation: Material certification and non-destructive testing of critical components

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.0005" on critical dimensions, 0.001" TIR concentricity
Test Method
CMM verification, thread gauge inspection, headspace gauge testing, proof load testing

Buyer Feedback

★★★★☆ 4.5 / 5.0 (23 reviews)

"Testing the Barrel Extension Interface now; the technical reliability results are within 1% of the laboratory datasheet."

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Barrel Extension Interface meets all ISO standards."

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Frequently Asked Questions

What is the primary function of a barrel extension interface?

The primary function is to provide a precise and secure mounting point for barrel extensions on firearm receivers, ensuring proper alignment, headspace control, and force transfer during firing.

Can barrel extension interfaces be interchanged between different firearm models?

No, they are typically model-specific due to variations in thread patterns, dimensions, and indexing systems. Always use manufacturer-specified interfaces for your firearm model.

What maintenance is required for barrel extension interfaces?

Regular inspection for thread wear, cleaning of mating surfaces, and verification of torque specifications during reassembly. Avoid overtightening which can damage threads.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Barrel Extension / Lugs Barrel Sections