---
title: "Trigger Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:TRIGGER_ASSEMBLY"
  data_integrity_hash: "86478dcd22bcfc48f59942b7b5d67838"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:TRIGGER_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/trigger-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/trigger-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "2.5-4.5 N pull force, 2.0-3.0 mm travel distance, 0.1-0.3 mm sear engagement tolerance"
    unit: "N"
engineering_limits:
  max_safe_operating_point:
    value: 0.05
    unit: "mm"
    consequence: "Plastic deformation of sear engagement surfaces (yield strength 450 MPa AISI 4140 steel) due to cyclic loading; fatigue crack propagation at stress concentration points (notch factor Kt=2.8)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Surface wear on sear engagement interface exceeding 0.1 mm material loss"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Diamond-like carbon coating (DLC) with hardness 3000 HV and coefficient of friction 0.15"
  - node_2:
      trigger: "Corrosion pitting on trigger spring (316 stainless steel) reducing cross-sectional area by 30%"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Nitronic 60 stainless steel with PREN 45 and ultimate tensile strength 690 MPa"
bom_nodes:
  trigger:
    type: "component"
    urn: "URN:CNFX:ME:TRIGGER"
    interface_type: "physical-logic-coupled"
  sear:
    type: "component"
    urn: "URN:CNFX:ME:SEAR"
    interface_type: "physical-logic-coupled"
  disconnector:
    type: "part"
    urn: "URN:CNFX:ME:DISCONNECTOR"
    interface_type: "physical-logic-coupled"
  trigger-spring:
    type: "component"
    urn: "URN:CNFX:ME:TRIGGER_SPRING"
    interface_type: "physical-logic-coupled"
  hammer:
    type: "component"
    urn: "URN:CNFX:ME:HAMMER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASME B46.1-2019 SURFACE TEXTURE"
    scope: "Verified Engineering Specification"
  - standard: "DIN 8580:2003-09 MANUFACTURING PROCESSES"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/trigger-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "d134622698678bd38dc31b7ae9709c786d4ccdbc6c5e409fcaab1b42db458f23"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Trigger Assembly

## 1. Technical Definition
The firing control mechanism of a tactical semi-automatic rifle that initiates the firing sequence when pulled.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **2.5-4.5 N pull force, 2.0-3.0 mm travel distance, 0.1-0.3 mm sear engagement tolerance**. Failure boundary: **Sear engagement &lt;0.05 mm causes unintentional discharge; pull force &gt;6.0 N causes trigger lock; hammer spring force &lt;15.0 N prevents ignition**, Mechanism: **Plastic deformation of sear engagement surfaces (yield strength 450 MPa AISI 4140 steel) due to cyclic loading; fatigue crack propagation at stress concentration points (notch factor Kt=2.8)**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Surface wear on sear engagement interface exceeding 0.1 mm material loss | 8 | Unintentional discharge during weapon handling | Diamond-like carbon coating (DLC) with hardness 3000 HV and coefficient of friction 0.15 |
| Corrosion pitting on trigger spring (316 stainless steel) reducing cross-sectional area by 30% | 8 | Increased trigger pull force to 8.0 N causing failure to fire | Nitronic 60 stainless steel with PREN 45 and ultimate tensile strength 690 MPa |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | N | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Disconnector](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/disconnector.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Machining Center**, **Coordinate Measuring Machine**, **Heat Treatment Furnace**  
**Downstream Applications**: Tactical Semi-Automatic Rifle, Sporting Rifle, Law Enforcement Firearm  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in this trigger assembly?
**A**: This trigger assembly is manufactured using 4140 alloy steel, stainless steel, and aircraft-grade aluminum for durability, corrosion resistance, and lightweight performance.

### Q: What components are included in the BOM?
**A**: The bill of materials includes: disconnector, hammer, sear, trigger, and trigger spring - all precision-engineered for smooth operation.

### Q: Is this trigger assembly compatible with all tactical rifles?
**A**: This assembly is designed for tactical semi-automatic rifles; please check specific firearm compatibility requirements before installation.

## 6. Manufacturing Compliance
- ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS
- ANSI/ASME B46.1-2019 SURFACE TEXTURE
- DIN 8580:2003-09 MANUFACTURING PROCESSES

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Trigger Assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/trigger-assembly)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **5** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: TRIGGER_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 056b1f8d
