All posts by Primary & Secondary

Primary & Secondary is a network created to discuss professional grade modern weapons and their applications with supporting equipment and skills.

The Varying Quality of the AR15 and Why. Part 1

By Will Larson, Owner: Semper Paratus Arms Over the course of the last few years and most recently in the last four years since I started teaching an AR-15 centric based armorer course, I usually get asked about what separates a “Hobby type AR” over one for professional use ( i.e.- anti-social gatherings). What we need to remember is that the AR-15 rifle born out of the AR-10 rifle as made by Arma-Lite was designed as a military weapon. Ultimately that means traveling to a foreign place and using it in combat. A weapons failure in combat is less forgiving than one on Saturday afternoon at the local shooting hole. Though it’s not a particularly easy question to answer, we can usually break it down into two distinct areas. The first one is the use of cheap, low cost components. Examples of this can include aluminum style Picatinny gas blocks, commercial type lower receiver extensions and bolts or barrels which have not undergone HP/MPI (High Pressure and Magnetic Particle Inspection) testing. This directly relates to the lack of any standards. Colt’s Manufacturing Company not only refined and re-designed the M16 after purchasing the patent’s and rights from Arma-lite, but they also

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Magpul PMAG Gen M3

Magazine Design Philosophy, Testing, and Performance of Magpul Industries PMAG Magazines for the AR/M4/M16/HK416/M249 By Duane Liptak, Director of Product Management and Marketing, Magpul Industries. Director of Magpul Core, Magpul Industries Corp. Building feeding devices for firearms is not a new endeavor, and many materials and methods of construction have been employed for this task. For many years, conventional wisdom regarding magazine construction was that metal was the material most suited to the task. Although other polymer magazines were attempted previously (Orlite, et. al.), the Magpul PMAG became the first generally accepted all-polymer magazine for AR-pattern rifles after its release in 2007. Early military testing drew some criticisms with performance at sub-arctic temperatures and with window material chemical resistance (In the MagLevel window variant). Rumors, assumptions, and outright incorrect information from this early testing and initial evaluations still persist, despite 7 years of materials, manufacturing, and design improvements to the PMAG product line, and millions of fielded magazines in continuous combat use in the GWOT. Current and ongoing testing, both internal and through third parties can easily and thoroughly dispel these rumors and assumptions from any early data. What follows is an explanation of what the PMAG “is”, why it

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2nd Amendment, Facts, & Social Media

We complain about liberal inaccuracies with firearms. Anti-gun agendas are using made up statistics and facts to scare people who don't know better. Much of today's pro-gun community on social media is also having issues with the truth. Too much rumor and inaccurate info is being spread as fact. The inaccuracies self perpetuate among groups because not enough people stand up for the truth. When people do stand up for the truth they are harassed and ostracized for having different ideas from common beliefs which also happen to be straight up wrong. If we want to defend the 2nd amendment and stand up for our rights we need to be on the same page. Spreading wrong info as fact misleads and weakens our position. Social media is a means of providing unchecked opinions with most being fueled by emotional attachments, not rational thought. Through social media, the loudest and most obnoxious seem to control the direction of the information flow. A great majority of those loud obnoxious people are also clueless about firearms, tactics, mindset, and training. Your airsoft grade optics on a bargain bin rifle might run great when you bench rest shoot half of a magazine yearly, but

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Competition Will Get You Killed On The Streets?

Tore Haugli provided insight in the P&S Facebook group P&S - Firearms Competitions in regards to an article that was critical of competition shooting. Here are this thoughts:  I have recently seen a trend where instructors from the "tactical world" are being very critical of competition shooting. Reasons behind this criticism varies from no focus on tactics, such as use of cover or concealment, walk throughs don’t happen in a gunfight, to competition creating training scars that will "get you killed in the streets", as the saying goes. A couple of articles touching on this topic were posted online recently, in a Facebook group I belong to. The author uses a lot of references to warfighting, and goes to great lengths to describe the differences of combat and competition, and why competition does not prepare you for the harsh realities of a combat gunfight. I asked the following questions based on this single excerpt from the first article: "A gunfight is a completely different world. The only factors that you can control are that of ammo you currently have and yourself. Everything else in this environment is now as random as rolling a pair of dice in crap shoot." -Is mission planning not a thing anymore?

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Law Enforcement Case Law and What it Means for You

So after Bill Blowers and I discussed LE training on a ModCast recently, I got several questions regarding case law and how it applies to training and where liabilities exist - so rather than answer a couple people, I’m going to address those questions and issues in this article. This article will serve you especially well if you’re involved in the training world at all for LE and trying to advance training, but hitting some roadblocks with the administration. First and foremost, if you are in any kind of training capacity for LE, you need to become intimately familiar with the term “Deliberate Indifference”. You are not always going to get your way when it comes to training, but this term will serve you well in two ways. The first way is, when you shed light on the fact that deliberate indifference exists within the organization, admin folks take notice. Secondly, making a claim of deliberate indifference will often shift the liability from you when claims are made, especially if you have documentation (emails, denied requests, etc).  So, what the does Deliberate Indifference mean?....Glad you asked. Deliberate indifference is defined as requiring (1) an "awareness of facts from which the

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P&S ModCast 21-1 Paul Gardner, USMC

https://youtu.be/em2GcmxeRHY Primary & Secondary ModCast Speaking with Paul Gardner (0311 USMC) about the 2003 gunfight in Iraq that left him paralyzed. http://www.warriorbenefit.org/ Things to consider: Was his reload causing an issue? Was his magazine orientation in the pouch creating an issue? Did his body position cause unneeded danger? How did he describe his hit on the second engagement? Why did he describe it that way? Could aimed fire have changed the outcome? How could trained buddy aid have helped the situation? Could additional firearms training outside what was provided have changed the outcome?
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B.E. Meyers: GLARE RECOIL

B.E. Meyers Awarded Sole Source Contract by U.S. Marine Corps for Ocular Interruption System February 10, 2016 (Redmond, WA) – Marine Corps Systems Command has selected B.E. Meyers & Co. as their sole source for the Ocular Interruption Program. The GLARE® RECOIL employs a dazzling laser to hail and warn potential threats while implementing escalation of force procedures. Commanders have a single, non-lethal hail and warning capable device to use across the range of Marine Corp military operations. The GLARE® RECOIL represents the culmination of a decade of technological development used to create the safest and most effective ocular interruption laser in the world. The GLARE® RECOIL features pioneering EyeSafe® technology with the latest advancements in automatic power control. The GLARE® RECOIL uses a 250mW maximum output power source, while its safety control design establishes the laser safety classification as a 2M laser system by using a Laser Range Finder (LRF), Near Field Detector (NFD), and 3-axis Gyroscope. This approach to laser safety in an ocular interruption device is unique to the B.E. Meyers design. The green beam is always effectively regulated by SmartRange™ technology and eye safety is sustained through controlling the maximum permissible exposure (MPE) on target. “We

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THE THIN BLUE LINE AFTER DARK

Economical Force Modernization Options for Law Enforcement Night Vision Equipment Abstract: Night Vision technologies have always carried a high price tag, but in recent years it has been more widely adopted in the Law Enforcement community. As departments and agencies better realize their capabilities and performance they have been incorporating Night Vision into their organizations’ capabilities. Unfortunately, they frequently encounter high costs, long lead times, and poor after-sale support. Nightlong Industries offers a range of different preventative maintenance, refurbishment, and upgrade options and for most common NV devices that can be customized to your organization's needs. The shared design parameters of many current Night Vision units means that existing components can be built into new housings to further offset costs. Our upgrade program can save organizations 75-80% of the cost of purchasing new and restore inoperative equipment to usable condition. Cost savings could allow organizations to field more Night Vision equipment, or budget for other mission critical equipment. Night Vision technologies have always carried a high price tag, but in recent years it has been more widely adopted in the Law Enforcement community. Many agencies and departments are realizing the benefits gained from the effective use of Night Vision but

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Porn Industry Chooses Magpul M-LOK

  This seems to be a current hot debate: Magpul M-LOK - Modular Locking accessory mounting system VERSUS Bravo Company KMR - KeyMod Rail system The science is fairly straightforward...M-LOK has more surface area, thicker edges (no 100 degree cone cut) so more material behind the slots, flat on flat engagement, and all the things discussed in the M-LOK FAQ on the Magpul website. KeyMod was an evolutionary step into negative space attachments, or at least a slight change of AI KeySlot, but just wasn't designed by an engineer or with engineering behind it with all of the material considerations in play. Some folks are happy with KeyMod mounting lightweight accessories without much abuse, and that's cool. Heavier stuff, high round counts, and generally treating the rifle like a tool ends up being really, really hard on KeyMod, and things can get loose, seats creep and crush, etc. The pullout, drop, high round count firing, shaker table, leveraged pullout, etc testing of initially KeyMod, and then KeyMod vs M-LOK was what led down the path to release M-LOK in the first place. Colt CA and other MFG have done their own evaluations, and that's why you saw a lot more

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EOTech Product Performance Issues

Primary & Secondary has received exclusive information previously only available to L3 Communications employees.  The documents below explain some of the product performance issues with EOTech holographic sights that have been long suspected by professional end-users, but have only recently come to be admitted as fact by L3 and EOTech. Topics covered in the memo that is republished below include: thermal shift, reticle fade, parallax, cold weather distortion;  and a FAQ covering many of the questions regarding performance of the sights, which are affected, and refund issues. Of special note to our professional end-user readers, copies and results of all testing done to arrive at the technical data points published in the below memo can be made available to government agencies who request it from L3 Communications.    
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