Tag Archives: AR-15

Home defense tip: Low Ready vs High Ready for you AR

Using your AR-15, a shotgun or any long gun for home defense requires some different techniques than those used with a pistol. If you have an AR platform rifle (or any other long gun) as your designated home defense weapon you need to be absolutely certain to use proper defensive ammo and pay close attention to Coopers 4th law. That is, always be certain of your target and what lies beyond it. Many of us have neighbors close enough to our homes–always remember that when a projectile leaves your gun you own it until it stops moving.

There are two weapon-ready carry techniques the US Army teaches for close-quarters combat: low ready and high ready. High ready looks like this:

 

 

 

  • Butt stock under the armpit
  • Front sights under direct line of sight but within peripheral vision
  • Barrel pointed slightly upward
  • Eyes forward- keep your visual focus downrange

 

 
To engage a threat from this position: drive the weapon forward and slide the stock onto your shoulder. Be sure to aim properly by looking over the rear sight.
 
 
 
 
Low ready rifle carry is nearly the opposite (hopefully that’s not a surprise) and looks like this:
 
 
 
 
  • Butt stock resting firmly on shoulder
  • Barrel pointing downward at about a 45-degree angle 
  • Eyes forward- keep your visual focus downrange
 
To engage a threat from this position: raise the front of the weapon to acquire a close quarters sight picture. 
 
 
 
 
 
 
 
Low ready is the most commonly used carry method and is the safest way to carry a rifle while remaining ready to take a reflexive shot if a threat is encountered. There are a couple other notable advantages to low ready for home defense:
  • You can fire as you bring the rifle up to your sight picture and get rounds on target
  • The rifle is in a more stable position offering a greater level of control and stability
  • Fewer steps required to get your rifle into the fight 
  • The muzzle is pointed in a safer direction for most situations (unless you have loved ones or neighbors below you)
Unload your rifle and remove any mags or ammo from the immediate area at home and double check the chamber to ensure it is clear. Practice both methods a few times and you will quickly realize which is more comfortable- at the -15 residence it’s low ready all the way. 

What were the worthwhile SHOT week debuts?

Glorious SHOT week. Every year the depth and breadth of new product announcements gets a little bit bigger. Drinking from the firehose of flagship product debuts can be nearly as overwhelming as walking the endless SHOT show floor. There are so many shiny things to catch your attention it’s easy to miss a few along the way. So here you go- the kR-15 list of notabke new products for SHOT 2014

ATN X-Sight Day/Night Riflescopes

This optic looks awesome- switch from daylight to infrared on the same scope. HD video out, smartphone remote viewing app and more- for less than $700 retail. They are offering 3-9 and 5-12 power models to start but these will be hot items.

 Tri-Star Cobra Marine Shotgun

Stainless steel to repel corrosion, spring-loaded forearm that claims to speed cycling (I’d like to try head to head with a Remington 870 or Mossy 500 to validate this one-but it sounds good), picatinny rail and more for $360 retail . 

TacSol 300 BLK upper receiver


Tactical Solutions makes some awesome kit. Their aluminum barrels and receivers are accurate, attractive and well designed. It’s about time they tossed their proverbial hat into the BLK caliber. At $1100 retail it’s pricy just like all their stuff but if it is intriguing- the upper is ready to rock, includes a BCG and features a free-float handguard, barrel shroud that covers either your own suppressor or the tacticool fake suppressor that comes with it. They hint that the fake suppressor is required to attain a 16″ barrel length– not a big deal but be advised.

Tac-Con 3MR Fire Control Group

I remain on the fence for this one but it’s getting lots of smiley reviews from initial testers. It is basically the bump-fire concept encapsulated into a drop-in fire control group that includes a giggle switch for the rapid fire mode. The thing I like most about this is the 3rd selector position. From initial reviews it seems that the rapid fire mode shrinks the trigger reset to about 1/16″ and has a 2.5lb pull. At the end of the day bump fire isn’t accurate so is it useful? Maybe not but full auto isn’t accurate either and people seem to enjoy it- try to find a video of someone using the giggle switch where they aren’t smiling if you don’t believe me.

Increasing the Reliability of your AR for Extended Use

The AR platform has a reputation for not operating reliably without regular cleanings- every 1000 rounds is a common interval. While this can be true with off-the-shelf configurations, a few simple drop-in upgrades can strengthen the rifle to ensure reliable operation for at least 80 standard capacity mags (2400 rounds) running the rifle dry. With a modern lubricant that will run dirty you should be able to get closer to 3000 rounds or beyond. Let’s start with the explanation of the problem source…

The popular myth is that the direct gas impingement system causes AR platform rifles to foul up by leaving powder and gas residue in the action (take a look at how it works and you can see how that seems plausible). Over time this supposedly results in fouling of the bolt and bolt carrier which manifest as failures to eject or to go into battery. Installing a heavier buffer, stronger action spring and a stronger extractor spring will take care of these problems by keeping the action working properly even as fouling occurs. The cost of these upgraded items is under $30 (plus shipping) if you go with the Sprinco enhanced reliability kit and a cheap H2 buffer from Amazon.

An H2 buffer and the Sprinco blue spring from their enhanced reliability kit are what I used in my rifle. That part doesn’t really merit photos- press the plunger down to release the buffer and spring and replace in the opposite order. The extractor spring was more interesting photo material so here is what you need to do to install it.

Disassemble your bolt carrier group the same way you would for maintenance:

Disassemble the extractor from the bolt like you would for normal cleaning (ignore the cam pin or set it next to the bolt if you insist on following directions to the letter):

Use a pliers to remove the O Ring from the extractor:

Now carefully remove the extractor spring and insert by twisting it counter clockwise and pulling:

Set the old extractor insert, spring and O ring aside and insert the new extractor insert, wider side down, into the extractor. Place the spring on top of it and press both into place using a pliers (wrap the ends in electrical tape to soften the grip area- even though the photos tell a different story).

Now replace the O ring and reassemble your bolt and the BCG (Bolt Carrier group). You may need to use the pliers to hold the extractor down now to replace the extractor pin- and that’s good because you now have a stronger extractor spring working to eject empty cases from your rifle. Here is a side by side comparison of the springs (Sprinco on the left and standard on the right):

This upgrade and a high performance lube like Frog Lube should be all you need to keep your AR running reliably through any extended use period. If you need to run it for more rounds without maintenance then there are bigger problems underfoot than a dirty rifle. 

 

 

 

Thoughts on Fire Control Systems

Basic fire control systems in AR type rifles can be rough. Heavy, creepy pulls, spongy breaks, and plenty of shots that could have been much more accurate…but that’s what you get with the basic models. Lots of upgrades are out there- the Geissele fire control groups like the one shown in this video spans the $200-$300 range and they aren’t too hard to install. Allen Ladieri makes it look easy too- the fire control group helps but this isn’t the first time he ran the gun and the drill we see. 

The sound of the steel ringing is nearly musical, isn’t it? Enjoy your weekend and stay safe.

How does an AR Bolt (direct gas impingement style) work?

Eugene Stoner is credited as the design engineer who created the modern day musket– the fascinating machine known as the AR-15. At the heart of Stoner’s design is the direct gas impingement mechanism. As a shot breaks this is what happens:

Gas is tapped from the barrel as the bullet moves past a gas port located above the rifle’s front sight base. The gas rushes into the port and down a gas tube, located above the barrel, which runs from the front sight base into the AR-15’s upper receiver. Here, the gas tube protrudes into a “gas key” (bolt carrier key) which accepts the gas and funnels it into the bolt carrier.

What you see in the image above is more than the bolt carrier group (the bolt, firing pin and bolt carrier)- the grey part in the middle of the diagram is the bolt carrier and the light blue portion is the bolt. The firing pin is shown in purple.

The gas pushes the bolt carrier group backwards like a piston. As the carrier is driven backward by the gas, the bolt is pushed forward by the gas- unlocking it from the lugs on the chamber. As the bolt carrier continues to travel backward, it rotates the bolt slightly. The fired (and contracted) cartridge case is pulled from the chamber. As the cartridge case reaches the ejection port, the case pivots on the extractor hook from pressure of the ejector until it is sent flying free of the rifle- ideally leaving a lovely brass mark on the shell deflector.

The bolt carrier continues backward into the buffer tube (compressing the buffer and operating spring) while re-cocking the hammer until operating spring pressure or the buffer stops it. The operating spring returns the bolt carrier forward where it strips another round from the magazine up the feed ramps and into the chamber.

As the cartridge stops in the chamber, the bolt continues forward, causing the extractor to snap over the rim of the cartridge case. The bolt finally stops against the case head, but the carrier continues forward- where the cam surfaces, rotating back into a locked position when it meets the lugs on the chamber (thanks to Randall_Rausch for helping with this description).

It’s interesting to note that the bolt rotation turns the locking lugs automatically, the same way the bolt handle is turned manually on most bolt-action rifles. The lugs ensure the cartridge’s position in the chamber is correct and that the pressure is sent down the barrel, pushing the bullet. What a magnificent design, Mr. Stoner!

Home Defense Tip: Aiming your AR in Close Quarters

It seems logical that anyone who keeps a firearm handy for defensive use would practice with that weapon to ensure that if they have to use it there are no surprises. This means practicing at close range (3 yds or less)- not 7 yds, not 25 yds and certainly not 50 yds. If you have an AR platform rifle or pistol as your primary home defense weapon or even as a potential option for home defense you owe it to your loved ones and yourself to practice close quarters handling and firing.

Bullet trajectory is an interesting phenomenon. Some good background on trajectory is here. If you want to be good at using your rifle in places other than a square range with targets at fixed distances take a few minutes to learn about what happens when you press the trigger. 

The photo above illustrates a traditional sight picture (what is used for a typical range shot at a target 25 or more yds downrange). The chart in the trajectory article referenced above illustrates where a close quarters shot will go with pretty much any zero – you’re going to hit high low (thanks to D. Russell for catching and pointing this out) if you aim the way the photo above depicts. In fact you may miss the target entriely or fail to neutralize the threat- and neither result is acceptable when the safety of you and your loved ones is at risk.

This problem has a pretty easy solution- one that is reliable and repeatable enough for a wide range of people that the US Army teaches it. The proper method of aiming close quarters shots is to maintain the typical rifle shooting position (cheek weld, nose touching the charging handle, etc.) but to look over the rear sight and use the front sight the same way you always do. 

The photo above illustrates this close quarters sight picture. Basically you want to position the base of the front sight on top of the ghost ring. The technique is reliable up to about 13 yards (12 meters) and allows you to engage threats quickly with the sort of accuracy required for self defense. In other words this should cover most home defense situations. 

Be sure to get out to a place you can practice this- that’s one key to deliberate action in a life threatening situation. Also be certain that you are using ammo that is safe for home defense- Range ammo (FMJs), Most frangible ammo and even Defensive ammo like Hornaday TAP can easily exit the walls of your home and keep traveling. Be responsible and stay safe out there.

Drop-In Trigger with a little something extra

Tac-Con is a company with an interesting idea. The 3MR: a drop-in trigger that offers a third fire mode (if you count safe as one mode). This new mode basically cuts down on trigger reset by using the motion if the bolt to assist. If that doesn’t sound impressive check it out in action:

 If you watch the video closely you will notice the guy is pressing the trigger for every shot- and the reason that they have an ATF approval letter confirming that the trigger system does not convert a rifle into a machinegun. Price-wise they run a little more than slide-fire type stocks. The third selector switch setting is intriguing- definitely more streamlined than a sliding stock. 

I’m not convinced it will perform quite as speedy with an average user running the rifle. I’d like to see one of these up against a skeletonized 3lb Timney to know if the assisted reset really is a cut above a match trigger. It’s certainly something to keep an eye on as initial evaluation units make the rounds.

How to Hit Moving Targets

Recently I spent a couple days working at my local gun club’s deer sight-in event. I landed a cool job- working the running deer target. The skill level of participants varied over the course of the days but this clip is a good example of the typical pass- dirt was the biggest threat to the running target.

A day of watching this play out over and over inspired this article- a few tips on how to shoot moving targets. The basic concept is pretty simple- lead your target enough to ensure that your shot can arrive at the desired point of impact at the right time to score a hit. 

There are two types of moving targets as defined by the heroes at Camp LeJune: steady moving targets and stop-and-go moving targets. Steady moving targets are like the trolly-laden running deer in the video above. Stop-and-go targets are more erratic because they tend to run to and from points of cover or concealment. Stop-and-go targets are easiest to hit as they leave cover because they require time to accelerate.

The lead is the distance ahead of your target that you aim a shot to ensure that the projectile does not fall short of the target since it will keep moving after your shot breaks. Lead is affected by range, angle and speed of movement. There are three types of leads:

1) Full Lead. The target is moving straight across your line of sight with only one arm and half the body visible. This target requires a full lead because it will move the greatest distance across your line of sight during the flight of the bullet.

2) Half Lead. The target is moving obliquely across your line of sight (at about a 45 degree angle). One arm and over half of the back or chest are visible. This target requires half of a full lead because it will move half as far as a target moving directly across your line of sight during the flight of the bullet.

3) No Lead. A target moving directly toward or away from you presents a full view of both arms and the entire back or chest. No lead is required. This target is engaged in the same manner as a stationary target because it is not moving across your line of sight.

 The USMC uses a system for calculating lead amount in points of aim- it’s covered here if you’re interested. There are two methods used to engage moving targets: tracking and trapping (aka ambush method).

Tracking a moving target requires the user to match the movement of the target with the front sight and establish the proper amount of lead before breaking the shot:

1) Point the weapon downrange and disengage safety.

2) Take up trigger slack and track the muzzle of the weapon through the target to the desired point of aim (lead). The point of aim may be on the target or some point in front of the target depending upon the target’s range, speed, and angle of movement.

3) Track and maintain focus on the front sight while applying trigger pressure and acquiring sight alignment.
4) Continue tracking and applying trigger pressure and acquire sight picture. When sight picture is established, engage the target while maintaining the proper point of aim (lead).

5) Follow through so the lead is maintained as the bullet exits the muzzle. Continuing to track also enables a second shot to be fired on target, if necessary.

Follow through is very important when tracking a target- if you stop moving before the shot breaks it is easy to miss. Remember that the target is still moving. Also this keeps you in position for a follow up shot if required.

The Trapping method requires the user to pick a spot and wait for the target to cross that spot. This method is useful for start-and-stop targets since a pattern can fequently be discerned if you study the movement quickly (OODA Loop again? Yep).

1) Look for a pattern of exposure, such as every five seconds, etc.

2) Rifle pointed downrange, safety off, trained on a selected point of aim ahead of the target. Take up trigger slack.

3) While applying trigger pressure, obtain sight alignment in the aiming area.

4) While continuing trigger pressure, hold sight alignment until the target moves into the predetermined engagement point and the desired sight picture is established.

5) When sight picture is acquired, engage the target.

6) Follow through (hold steady)  so the sights are not disturbed as the bullet exits the muzzle.

 And there you have it – two tried and true methods of engaging moving targets- 2 legged, 4 legged and even rolling! Stay safe out there.

Function Check Procedure for your AR

This is a pretty solid refresher- although you should perform the function check every time you reassemble a rifle. It doesn’t matter if you removed the bolt for a quick field lube or if you just installed parts in the lower receiver– this is an important part of confirming that the rifle is in good working order before firing it. 

Maybe the giggle switch pictogram on the lower is just for show but in case you’re interested the procedure is the same as the semi check except after the first trigger/hammer check you pull the charging handle 3 times before you release the trigger.

 

Modern Firearms Collection for $2500 – Part 3

Lately there has been some discussion across the interwebs on how to build up a pragmatic modern firearms collection. Utility and reliability across a broad range of applications and scenarios ranging from EDC (every-day carry) to WROL (without rule of law) are the criteria for the kR-15 edition of this list. The first item on this list is a compact frame pistol. Next on the list is a pistol caliber carbine and a 10/22 rifle. Those items come to about $1250 retail so where does the rest of the $2500 get spent? This post covers the last two items on the list: 


4. Modern Sporting Rifle like the Armalite-15

There are many reasons that AR pattern rifles are so popular:

  • they are easy to shoot and can be handled accurately by most users
  • the platform is extremely modular and versatile – it can be configured for nearly any application with minimal tools and technical expertise
  • If properly lubricated it will run and run – if you can’t perform simple occasional maintenance get an AK instead
  • it’s great for hunting- contrary to what senseless politicians say on TV the AR is a popular hunting rifle and is well suited too the task due to its propensity for precision
  • that same knack for precision makes this rifle a great choice for self defense (so long as you use the proper defensive ammo for your home)
  • Standard capacity mags for the AR platform are 30 rounds. If your state has outlawed standard capacity magazines please consider moving to a free state because that government doesn’t deserve your tax revenue.

Prices are gradually coming down after the seemingly endless panic buy that started with the re-election of the incumbent POTUS and the general realization that he hates the 2A and will do anything and everything he can to disarm the law-abiding citizens across America. So how much should you budget? Here is my breakdown:

Base rifle: $700

Flip-up sights: $200

If you go with a flattop rifle (which is more modular than its predecessors) I highly recommend starting with quality iron sights- not the plastic magpul ones but durable metal ones like MI or Troy. Get flip-ups in case you decide to add an optic. 

5. Pump-Action Shotgun

A shotgun offers a lot of versatility with a low buy-in. Mossberg 500 series or Remington 870 are excellent options. Both enjoy large user bases across the country and have a wide range of uses. You can use a shotgun for most game in North America – including birds. They also support a wide range of ammunition and are rather resilient. Although I prefer precision and accuracy, a shotgun can be very effective defensive weapon. Some shotguns offer interchangeable barrels for different applications- for example a slug barrel will have rifling to help a slug fly better while birdshot is best used with a smooth barrel and a choke to pattern the shot to your application. 

Remington 870 Express: $ 400

Mossberg 500: $350