College of Engineering and Polymer Science

Date of Last Revision

2023-05-05 09:03:29


Mechanical Engineering

Honors Course

4600 497-001

Number of Credits


Degree Name

Bachelor of Science

Date of Expected Graduation

Spring 2022


The Multi-Platform suppressor is a design that is meant to bridge the gap in the suppressor market by being compatible and configurable with both rifle and pistol platform firearms. In the specific design and prototype referenced in this report, the Multi-Platform suppressor was designed to be used with 9mm pistol and 5.56x45mm rifle calibers with safety, effectiveness, and practicality in mind. To achieve this, the suppressor is configurable, utilizing a Nielsen device in the pistol configuration and a solid mount adapter that replaces the Nielson device piston and spring while in the rifle configuration. This allows the suppressor to retain functionality and reliability when setup for either platform. A unique internal baffle design optimizes the suppression capabilities of the suppressor allowing for notable suppression of both calibers for which it was designed. Data collected through live prototype testing proved the Multi-Platform suppressor was able to exceed the original design criteria and reduce the sound pressure levels of the 9mm handgun down to an average of 117.1 dB, approximately a 48 dB reduction over an unsuppressed 9mm handgun, and a 5.56x45mm rifle down to an average of 134.6 dB, just over a 33 dB reduction compared to an unsuppressed 5.56x45mm rifle. The suppressor proved to be reliable through endurance testing and was able to achieve many of the goals and specifications set at the start of this project.

Research Sponsor

David Peters

First Reader

Manigandan Kannan

Second Reader

Gopal Nadkarni

Honors Faculty Advisor

Donald Quinn


Disclaimer: Due to restrictions through the ATF and federal law, only one prototype was manufactured and all spare parts were disposed of properly. All parties involved in the process of designing and building the suppressor have complied with federal law and ATF regulations.

Final Report Signature Sheet.pdf (68 kB)
Approved Final Report Signature Sheet

Honors Cover Sheet (complete).pdf (192 kB)
Completed Proposal Cover Sheet



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