Tag Archives: Ar15

Sucked Down the Tube: A Failure in Training

Much, if not all training and practice is conducted on flat ranges under calm conditions with no surprises. We shoot steel and paper that we purposely place and identify. We have lanes and all sorts of safety considerations that make a day at the range a pleasant experience.  This is fine for most of us but can lead to some critical failures if you are in a line of work that may not look the same as the flat range.  For those that form either the thin Blue or Green Lines targets will probably appear in from unknown positions and ranges. Many people preach situational awareness but fail to account for it in our training. COL Boyd gave us the OODA loop, which on the surface, is a rapidly trainable flow of Observe, Orient, Decide and Act. It is a loop because as soon as you act you start over. Observe. To hit a target, you must first observe it. You could possibly be an intergalactic grand sensei with Generation Next hardware and you will still miss a target you didn’t see. With the proliferation of magnified optics, the tendency of getting sucked down the tube is becoming more prolific

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Inches, Minutes, Clicks- Zero That Blaster

Zeroing is literally one of the most important thing we need to accomplish with our rifles and #spacegun pistols. There is much talk around the technique to accomplish this but there is one way that is easy and fast. First, determine the desired zero distance.  This will vary by rifle, optic, caliber, and most importantly purpose of the firearm. Many people with AR15 rifles use either a 100, 200, or 300 yard/meter zero. Rather, many people claim to use those ranges but most use the near zero distance on either 25 or 50-yard target. Yes, I am talking in yards here because most people on this page are not using meters. Now, to save yourself time, you can use a borelight or something like the Telluric Group Small Arms Collimator. There are lasers available in every price range and should be part of your tool kit. Doing this step will put you at the very least on paper at 25/50 which will save you rounds and frustration. Ask me how I know. Regardless of borelight or not, it’s time to shoot bullets. Get into the most comfortable and stable position possible. One that you can duplicate easily. For you Army

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Understanding the AR-15 Gas System

The AR-15 Direct Gas Impingement System is a rather straight forward system to understand. When the weapon is fired, gas travels down the barrel behind the bullet. As it passes the gas port, it is diverted into the Front Sight Base (FSB) or Gas Block into a gas tube which carries it into the bolt carrier key. Once the gas arrives at the key, it dumps the gas into a chamber causing the bolt carrier to move rearward.                                              (Elements of the gas system) Gassing starts in the chamber with the round of ammunition. This means that ammunition selection is important. Ammunition may be loaded to either .223 specs or 5.56 NATO specs. Ammunition produced with poor quality control can affect the operation of the weapon. From here we move to the gas port. The gas port is very important to the overall function of the rifle. In the military world this is virtually a non-issue since gas ports are standardized. In the commercial/civilian world a manufacturer can gas their barrel anyway they want. One of the first things

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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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“MIl-Spec” – The Minimum Standard For Quality

"Milspec" is a sales buzzword that provides a loose definition of the minimum standard of quality for a specific dependable combat weapon. There are several brands that say they are milspec and are not even close to that minimum level of acceptable quality. If you are buying a weapon for fun or for just plinking, anything will do. If your weapon is for work, home or self defense- you should look more closely at the options you are considering. If a brand is providing weapons that don't feature these examples they aren't meeting "milspec": -milspec receiver extensions versus commercial -1/7 twist -5.56 chambers -auto bolt carrier group -staked gas key and castle nut Those are just some simple examples that are easily checked. The combination of 1/7 twist and 5.56 chambers are set for specific types of military grade ammunition (m855 and m193 for example). If you plan on shooting light weight ammunition, 1/9 twist works fine. 1/8 provides a well rounded performance for various projectiles. Medium and longer/heavier projectiles work well with 1/7 twist. A "milspec" carbine would use a carbine length gas system. Most people that know better prefer a midlength gas system in a carbine. To make

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