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Documents Repository: Small Arms


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Freshman outing here, I go by James elsewhere. I stole the entirety of Sturgeon's library last night, so I figured it would be kind of me to reciprocate. :) PDF warning for all of these.

Sensitivity Study of Rifle Gas Systems

Comparison of a Theoretical and Experimental Study of the Gas System in the M16A1 Rifle

 

The Gas Flow in Gas Operated Weapons

Enjoy!

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And more DTIC oddities:

 

INTERIOR BALLISTICS OF LIQUID PROPELLANT SMALL ARMS

 

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This final report summarizes the research performed on Ordnance Contract No. DAI-ll-022-0RD-P(8) entitled "Interior Ballistics of Llquld Propellant Small Arms". This work was performed tinder the technical supervision of Frankford Arsenal during the period August 1951 to 30 November 1955 and is identified as American Machine and Foundry Company« s Project MR1025. The Mechanics Research Department of the American Machine and Foundry Company is glad to cooperate with Frankford Arsenal in this research program, and any suggestions or comments on the work performed will be appreciated.

 

LIGHTWEIGHT RIFLE/SUBMACHINE GUN

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The object of this program was to design and fabricate four demonstrator weapons to be used by the Air Force Armament Laboratory, Eglin Air Force Base, Florida, to prove the feasibility of its automatic weapon concept which utilizes the shooter's arm as the gunstock.-demonstrations proved the basic concept was not only feasible but exceeded expectations. Further efforts will be mrde to improve trigger pull, trigger guidance, pistol grip locking, the arm rest, sighting, and to modify the design for quantity production. the origin of the stockless rifle and machine gun is described in the publication, "Ordnance", American Ordnance Association, September - October 1970, under the title "A Novel Survival Weapon" by Dale M. Davis.

 

 

A COMPENDIUM OF BALLISTIC PROPERTIES CF PROJECTILES OF POSSIBLE INTEREST IN SMALL ARMS

 

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The report is a compendium of the ballistic properties of projectile shapes of possible interest in small arms applications. The  shapes cover a range of L/D ranging from conventional bullets (-3.5) to that of flechettes (-20) and include such shapes as cones, cone cylinders, and cone flares. The ballistic properties are mapped over a range of calibers and projectile densities. A drag-reducing tracer is included as one of the prime design considerations as a means of reducing base drag. Tabulations include velocity, energy, angle of fall, time of flight, and height as a function of range, with constraints on recoil momentum. Aerodynamic coefficients are also included.

 

A TECHNICAL ASSESSMENT OF ELECTROMAGNETIC PROPULSION FOR SMALL CALIBER WEAPONS APPLICATIONS

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An assessment of the future potential of electromagnetic propulsion for small caliber weapons has been performed to consider possible benefits, systems configurations, research and development needs, and mission requirements. The assessment consists of a panel evaluation of an existing JSSAP electromagnetic launcher EML program and comparisons of envisioned point designs for small caliber weapons systems. The general conclusions are that the present research effort is well-founded and that EM propulsion has a great deal of potential for a vehicle mounted, crew-served weapon. Although the potential improvements are significant, some risk in maturing the technology to a fielded weapon is accrued from the number and complexity of components in the EML system.

 

DYNAMIC ANALYSIS OF SHOULDER-FIRED WEAPONS

 

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A recoil analysis to assess several recoil mitigating technologies applied to shoulder-fired weapons such as a grenade launcher or shotgun has been conducted. Parameters such as weapon weight, recoil impulse, recoil velocity and recoil energy were identified as critical. A range of values were selected for evaluation. In order to monitor and assess the dynamics occurring during its cyclic motion, a mathematical model for a 12 Gauge weapon has been developed. The model defines each major component and the relative connectivity between them is defined in terms of kinematic joints. A Lagrangian methodology is utilized to formulate the rigid body dynamic equations of motion. Three commercial recoil reducing devices were evaluated in the model to determine their specific effect on recoil motion, both on the weapon and on the soldier firing the weapon. A full test program was conducted at the Armaments Research Laboratory (ARL) on a modified 12 Gauge shotgun to measure recoil control for each of the recoil devices. An additional model was formulated for this fixture. Comparisons between model and experimental test results were made. Further tests and evaluation include combinations of recoil devices. Documentation of sample model output is included.

 

SHOULDER-FIRED WEAPONS WITH HIGH RECOIL ENERGY: QUANTIFYING INJURY AND SHOOTING PERFORMANCE

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Sufficient information is not available to determine health hazards associated with weapon recoil. This study assessed the injury response in U.S. Army soldiers after firing a shoulder-fired weapon producing recoil energy at the upper limit authorized. Additionally, the authors observed injury rate and potential injury risk factors. Fifteen infantrymen fired 15 shots using a weapon system producing 59.09 ft-lbs of recoil energy. Markers of injury assessed pre-firing, immediately post-firing, and 24, 48, 72 and 96 hours post-firing included subjective pain, pain-pressure threshold, bruising, range of motion, strength, a lifting task, and laboratory markers. Thermal imaging and MRI were used to assess skin temperature and edema. Data were analyzed using repeated-measures ANOVA, Pearson correlations, and descriptive statistics. All 15 volunteers exhibited bruising at the anterior shoulder, and 11 reported pain with motion post-firing. Fourteen volunteers (93%) sustained evidence of soft tissue injury on MRI. Three (20%) sustained facial lacerations. Skin tissue temperature increased immediately post-firing and returned to baseline 24 hours later. Dominant handgrip strength had the best predictive value for injury severity on MRI. The authors conclude that soldiers are at risk for soft tissue contusions and lacerations at the upper threshold of allowable recoil energy. Injury was characterized by elevated skin temperature, pain with motion, and decreased pain threshold immediately post-firing. Signal intensity changes on MRI were consistent with muscle contusion for up to 96 hours post-firing. 

 

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2 hours ago, A_Mysterious_Stranger said:

LIGHTWEIGHT RIFLE/SUBMACHINE GUN

Quote

The object of this program was to design and fabricate four demonstrator weapons to be used by the Air Force Armament Laboratory, Eglin Air Force Base, Florida, to prove the feasibility of its automatic weapon concept which utilizes the shooter's arm as the gunstock.-demonstrations proved the basic concept was not only feasible but exceeded expectations. Further efforts will be mrde to improve trigger pull, trigger guidance, pistol grip locking, the arm rest, sighting, and to modify the design for quantity production. the origin of the stockless rifle and machine gun is described in the publication, "Ordnance", American Ordnance Association, September - October 1970, under the title "A Novel Survival Weapon" by Dale M. Davis.

 

Oh hey, it's the Davis Gun. We have that at work.

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  • 4 weeks later...
On 3/16/2018 at 4:11 PM, Sturgeon said:

 

Oh hey, it's the Davis Gun. We have that at work.

And if you were unlucky enough, you even owned one of the silly things (or at least an attempt at it).

 

It took a long time for me to not laugh when someone mentioned "bushmaster" in the same sentence with "AR-15".

14 hours ago, Stimpy75 said:

Ah, yes Chinn's works are excellent.  Another to look for is "Automatic Arms" by Johnson and Haven.  The "Johnson" is "Melvin Johnson".

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  • 2 weeks later...
Here are links to all 12 volumes of the US Army's "Report of the M16 Rifle Review Panel" written in response to the Ichord Subcommittee Hearings and Report. DTIC has finally made the entire set available online for free download.

History of the M16 Weapon System

http://www.dtic.mil/dtic/tr/fulltext/u2/a953110.pdf


Small Arms Test Policies and Procedures
http://www.dtic.mil/dtic/tr/fulltext/u2/a953111.pdf

Audit Trail and Analysis of M16A1 Weapon and Ammunition System Tests
http://www.dtic.mil/dtic/tr/fulltext/u2/a953112.pdf

Review and Analysis of M16 Rifle Training
http://www.dtic.mil/dtic/tr/fulltext/u2/a953113.pdf

Ammunition Development Program
http://www.dtic.mil/dtic/tr/fulltext/u2/a953114.pdf

Procurement, Production, and Distribution History of the AR15-M16-M16A1 Weapon System
http://www.dtic.mil/dtic/tr/fulltext/u2/a953115.pdf

Review and Analysis of M16 System Reliability
http://www.dtic.mil/dtic/tr/fulltext/u2/a953116.pdf

M16 Surveys in the Republic of Vietnam
http://www.dtic.mil/dtic/tr/fulltext/u2/a953117.pdf

Review and Analysis of the Army Organizational Structure and Management Practices for the Development, Testing, and Product Improvement of Small Arms Rifle Systems
http://www.dtic.mil/dtic/tr/fulltext/u2/a953118.pdf

Audit Trail of Chief of Staff, Army Actions and Decisions Concerning the M16
http://www.dtic.mil/dtic/tr/fulltext/u2/a953119.pdf

The Army Small Arms Program
http://www.dtic.mil/dtic/tr/fulltext/u2/a953120.pdf

M16 Product Improvement Modifications
http://www.dtic.mil/dtic/tr/fulltext/u2/a953121.pdf
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SALVO I rifle field experiment

 

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The ammunitions tested include .30-cal duplex and triplex rounds (two and three tandem bullets), compared in hits scored against standard single-bullet AP M2 ammunition. Two "minimum-climb" fully automatic .22-cal (single-bullet) types of fire were also tested: the Gustafson carbine and a modified T48 rifle. Automatic burst fire from these weapons was compared with semiautomatic fire from the same weapons. A 32-flechette load was also fired from a 12-gauge semiautomatic shotgun

 

The T48 appears to have been chambered in what became .223 Remington.

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