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Enhancing Rifle Ergonomics for Improved Performance

This presentation discusses the development of an Adjustable Ergonomic Rifle Grip, focusing on the M4A1 Carbine rifle and its advantages over the M16 rifle. It addresses the need to improve shooting stances, reduce musculoskeletal injuries, and cater to the needs of military, law enforcement, and gun enthusiasts. The technology presents a novel grip design with multiple angles for enhanced comfort and performance. Legal landscape and next steps for industry collaboration are outlined for further development.

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Enhancing Rifle Ergonomics for Improved Performance

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  1. CAPT JT Elder, USN Commanding Officer NSWC Crane Dr. Brett Seidle Technical Director NSWC Crane Adjustable Ergonomic Rifle Grip Presented By: Jason M. Davis CRANE-200004

  2. Tale of Two Rifles M16 rifle • introduced: 1963 • barrel length: 20” • fixed stock • no built-in mounting surfaces 4.25” 5.5” M4A1 Carbine rifle • introduced: 1994 • barrel length: 14.5” • adjustable stock • rail system for mounting electro-optics

  3. Why the M4A1 Carbine? • Lessons from Operation Desert Storm (1991) • Jungle warfare to urban warfare (Close Quarter Battle) • Vehicle ingress/egress • Body armor • Weight Tradeoff • Effective range • Unintended consequences

  4. Vietnam-era Shooting Stance elbow up & out wrist straight side forward facing

  5. Current Shooting Stance wrist bent chest forward facing elbow down & tucked

  6. Shooting Stance Look Familiar? • New shooting stance more “natural” • Coverage of body armor best in front and back • Stance better accommodates shorter weapon • Weapon transitions made easier

  7. Need • Address the unintended consequence of a bent wrist during firing • Why? • Poor ergonomics • Can lead to vibration-induced musculoskeletal injury • Market included military, law enforcement, and gun enthusiasts

  8. The Technology MilTech Prototype

  9. The Technology (positions every 4) Rearward Most Position MilTech Prototype Foreward Most Position

  10. Competition • Advantages • Provides two additional grip angles over standard grip • Simple two-piece design • Disadvantages • To adjust angle, requires user to loosen pistol grip screw • Creates potential to lose safety selector spring and detent • Pistol grip screw responsible for mating two pieces of grip together • Wear at interface a concern

  11. If spring or detent is lost, weapon becomes un-operational! Spring Detent • Three bad things… • Not having a weapon • Not having a working weapon • Running out of ammunition

  12. Legal Landscape & Next Steps • Notice of Allowance received from USPTO on January 20th • Looking for an industry partner • Obtain user feedback with current prototype • Make design changes based on feedback • Conduct early user assessment

  13. Contact Information Jason M. Davis Project Principal Investigator NSWC Crane 300 Hwy 361 Code JXNR, B-3422 Crane, IN 47522 (812) 854-6855 jason.m.davis3@navy.mil Brooke Pyne NSWC Crane ORTA Technology Transfer (T2)/SIBR Program Manager NSWC Crane 300 Hwy 361 Crane, IN 47522 (812) 854-4823 elizabeth.b.pyne@navy.mil

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