Category Archives: Weapons

Just as good as…

No not everyone can build an AR. Stick with a known quantity. Today I had a student who's carbine was experiencing both timing issues and failures to eject (stove pipes) consistently. It was a tell tale over gassed carbine with a weak extractor. I passed him my SBR to let him finish the day and went to work on his carbine. Now to his rifle. The extractor was weeeak. I could fully depress the tail with finger pressure. The claw was sharp so I upgraded the springs, functions checked it, and went to test fire. Bang Bang Bang Choke.... The gun still ejected at 1-130 and eventually the round wouldn't clear the port on the back stroke. The bolt velocity being high, would catch the case head and trap it in the forward edge of the ejection port, with a partially striped live round. I went back to the bench and pulled the buffer. The 16" gun came with a std carbine buffer. I pull it and compare it to a spare H buffer in my kit. His buffer was noticeably lighter, so I installed the H buffer. Test fire. The gun cycled nearly through an entire mag of m855,

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Autopsy Of A Rifle: DPMS Oracle 5.56mm

Part 1: Overview This is a factory new DPMS Oracle. And, it's the first rifle featured in our "Autopsy" series. This rifle was unboxed and fired for function. 60 rounds of M193 were fired to test for any obvious issues which would eliminate it as a candidate for this series. This is an objective review, from an armorer's perspective of the components and assembly procedures of this rifle. This is not a knock at DPMS or their fans, but the purpose of Gun Plumbers Inc is to educate shooters on various platforms to help them make the most informed decision when buying a rifle or components. Part 2: Lower receiver. Lower receiver appears to be in-spec and small lower parts are installed correctly and are of the correct materials. Then again, you have to really go out of your way to mess up a detent. This rifle comes with a carbine buffer weight and milspec action spring. We'll come back to this later on. Castle nut is not staked, and receiver extension threads have not been treated with anti-seize. Castle nut broke loose at 22ft/lbs. (38-42ft/lbs is textbook). Coupled with no staking that could be an issue under a heavy course

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DIY isn’t always the best option…

  A great example of how poorly understood this platform really is.  This hack job was done by a professional gunsmith. What started out as a solid CHF Centurion 16" carbine barrel...is now an example we will use in an Armorers course. A customer had a 16" barrel with carbine gas system...with an appropriate gas port for that config. This barrel was made by FN, and sold by Centurion (both awesome companies.) The customer took this barrel to a gunsmith to be cut down to an 11.5" barrel. It was cut, recrowned, and threaded beautifully...but it won't run. Why? Because the gunsmith never bothered to open the gas port to compensate for the reduction of dwell time. The customer was frustrated the gun wouldn't run and sought help on the internet...where all the experts live. He was wrongly informed his problem was gas block alignment and was instructed to dimple his barrel...with a hand drill, and no jig. You can see how awesome that turned out...  
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Accuracy and Optics Placement

Accuracy by volume is a great concept; however time is working against you with that process. In order for us to be efficient little gunfighters we need true accuracy; accurate with each shot. This all starts with us the shooter. We need a good foundation of the basics to be able to function efficiently and accurately. Through training and practice we can increase our accuracy, efficiency, and overall speed. We can get the most accurate weapon and give it to someone who is not trained and efficient and they will not perform as well as one who is trained. When I mention efficiency I'm referring to effective weapon manipulation and sufficient speed of getting on target, pressing the trigger and providing follow up shots as needed and doing this all while still making accurate hits on target. Once we iron out our performance issues then we can focus on weapon improvements. Some of these deficiencies we can address immediately while we train. A weapon’s accuracy is a combination of the weapon itself, whatever sighting system it uses, and how those two components are put together (mounts). If we have an quality firearm but a cheap optic you have negated the

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Weapons For Home Defense

The ability to protect ourselves and our loved ones at home is of paramount importance.  With this in mind it is best to understand the options available to maximize your effectiveness if you need to use deadly force in defense of yourself and your family while at home. Before delving into weapons, it is important to understand the need to have a plan already established and practiced before you need to use it.  If you hear that bump in the night, or you hear an obvious entry into your home or hear people that don’t belong – do you call 911, bunker down with a weapon and lock yourself in?  Do you arm yourself and investigate?  If family members (specifically children) are in other rooms, can you communicate with them or reach them without putting yourself or them in potential danger? Whether you bunker down or investigate you need the ability to identify potential threats.  Optimally we all have night vision goggles with infrared lasers mounted to our weapons so we don’t give away our positions, but not many have that luxury.  For the rest of us normal people, we need light.  That light can be activated by a wall

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Truck/Trunk/SHTF Gun

In a discussion on Facebook the concept of a truck/trunk/SHTF gun came up. A serious discussion was had about combat around vehicles, optimal guns, and cover versus concealment (in regards to cars). It seemed there was a theme with some of the participants that they felt a truck gun was similar to a shovel – a tool that can be thrown in the back of the truck/car/trunk and no further care would be given. Worse was the concept that the cheapest option would be the best option. So let’s think about this further. The fact a crappy gun is present is sufficient for their comfort – they have a safety blanket and all will be well. If you are committing this offense – think about it for a minute. Why do you have this gun? The purpose if this firearm is to help you survive (and maybe escape) a violent incident. Is an unmaintained cheap option going to fit that specific need? NO!!! There is a standard for weapons that one would rely on in life or death options, they typically run closer to the high end of the spectrum compared to the cheap options. Instead of spending money on

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