Two-Part Rifle Bedding Block for Lightweight Action Mounting

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Solution Overview

Problem

Existing rifle mounting systems, such as those using epoxy compositions or bedding blocks, require gunsmith intervention and result in permanent stock-action combinations, limiting versatility and increasing weight, especially in lightweight firearms.

Innovation Solution

A two-part bedding block system comprising a rear and front action screw pillar, which can be epoxied into a composite or wood stock, allowing end-users to securely mount a rifle action without traditional pillars and epoxy, reducing weight by approximately 4 ounces compared to single-piece blocks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a one-piece aluminum bedding block is used, then the mounting system is simple and strong, but the weight increases by approximately 6 ounces

Engineering Contradiction:
Improvemounting system strengthVSAvoidbedding block weight
Core Design Contradiction:
StrengthVSWeight of moving object

Solution Approach 1:

The bedding block is divided into two separate pieces: a rear bedding block and a front bedding block. Each piece is secured independently with its own set of screws, allowing the action to be mounted through distributed fastening points. This segmentation reduces the weight of each individual block while maintaining overall structural strength through multiple attachment points.

Inventive Principle:
Principle #1Segmentation

2Reliability

If epoxy composition is used to bed the action to the stock, then the action-to-stock fit is precise and stable, but the stock and action are permanently married, limiting adaptability

Engineering Contradiction:
Improveaction-to-stock fit stabilityVSAvoidstock-action configuration flexibility
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The mounting system transitions from a static, permanent epoxy bond to a dynamic, reversible mechanical fastening system. The action can be securely mounted using screws through the bedding blocks, and equally easily removed and reconfigured. This allows the shooter to adapt the stock to different barreled actions without permanent modifications, providing flexibility while maintaining stability during use.

Inventive Principle:
Principle #15Dynamics

3Reliability

If traditional pillar and epoxy bedding system is used, then the mounting is secure, but gunsmith intervention is required, increasing complexity of installation

Engineering Contradiction:
Improvemounting securityVSAvoidinstallation ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The bedding block system is designed to be self-installing by the end user without requiring gunsmith expertise. The two-piece design with pre-configured screw holes and mounting interfaces allows the shooter to independently secure the action to the stock using basic hand tools. The system eliminates the need for specialized epoxy application skills and gunsmith intervention while maintaining secure mounting.

Inventive Principle:
Principle #25Self-service

4Device complexity

If a single-piece bedding block is used, then the structure is simple, but the weight is higher and adaptability to different actions is reduced

Engineering Contradiction:
Improvebedding block structureVSAvoidbedding block weight
Core Design Contradiction:
Device complexityVSWeight of moving object

Solution Approach 1:

The bedding block is divided into two separate pieces: a rear bedding block and a front bedding block. Each piece is secured independently with its own set of screws, allowing the action to be mounted through distributed fastening points. This segmentation reduces the weight of each individual block while maintaining overall structural strength through multiple attachment points.

Inventive Principle:
Principle #1Segmentation

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system provides a lightweight, secure, and accurate mounting solution that allows for easy adaptation to different barreled actions without increasing weight, maintaining precision and accuracy, and enabling easy conversion between calibers or manufacturers.

Implementation Method 1

A conventional rifle generally comprises groups of components, each one typically consisting of several additional subcomponents. These groups may include the bolt assembly, the barreled action, the trigger group, and the stock.

Methodology Applied
Scientific EffectEpoxy bonding: Adhesive

Implementation Method 2

A bedding block is a block of aluminum mounted or bedded within a stock and configured to receive the action bolts or screws therethrough to secure the action to the block and thus the stock.

Methodology Applied
Scientific EffectMechanical fastening: Mechanical Fastener

Data Source

PatentUS12607423B2Two part bedding block for a firearm
Publication Date: 2026.04.21 MANNERS COMPOSITE STOCKS LLC
  • US12607423B2 patent drawing
  • US12607423B2 patent drawing
  • US12607423B2 patent drawing

AI summary

A firearm including a rear action screw pillar configured to mount in a stock of the firearm and receive a rear action screw therethrough to secure an action of the firearm to the rear action pillar. The firearm further includes a front action screw pillar configured to mount in the stock of the firearm forward of the rear action screw pillar and receive a front action screw therethrough to secure the action of the firearm to the front action screw pillar.