Archive for the 'AR-15s' Category

I had never seen this and Kyle does a good job of showing how to do it, but I’d want to practice it if I ever thought I was going to need it.

News from Florida.

SUMMERFIELD – Marion County sheriff’s officials say a homeowner armed with an AR-15 shot and killed two intruders and was injured himself during a home invasion robbery in Summerfield Wednesday night.

Two other robbery suspects  Robert John Hamilton, 19, of Ocala, and Seth Adam Rodriguez, 22, of Belleview  were detained near the scene, according to the Marion County Sheriff’s Office.

Nigel Doyle, 22, of Summerfield, and Keith Jackson Jr., 21, Ocala, were killed. The homeowner, whose name was not released by the Sheriff’s Office, was in stable condition at a hospital Thursday afternoon.

Rodriguez was arrested on charges of murder and home invasion robbery with a firearm. Hamilton faces home invasion robbery with a firearm. Both men were being held in the Marion County Jail without bond.

Deputies got the call at 8:21 p.m. Wednesday and went to the home at 14999 SE 32nd Court Road in response to a report of shots fired.

Sgt. Micah Moore found Doyle with a gunshot wound and a shotgun next to him on the ground. Deputies entered the home and found Jackson dead on the dining room floor. Detectives said he was wearing a “Jason” mask on top of his head, gloves on both hands, jeans and a black shirt.

They all look so nice, don’t they?

So you can tally yet another multi-intruder home invasion where an AR-15 and [presumably] standard capacity magazine saved a life.

Mr. Stephen Bayezes says hello.

John Lovell gives a tutorial.  I still consider the Magpul “Art of the Tactical Carbine” to be the best.  However, John provides some helpful tips.

Finding the “small of he shoulder” is difficult if you lift weights.  What happens is that the butt always lands on the pec.

Also, the thumb-over-bore grip is cool, but my son said what John did.  My son conducted room clearing for hours and days, and the only grip that works for that long is a much closer one.

In case you’re an idiot and were wondering.

Two Senate Democrats falsely claimed Monday that the AR-15 is not used for hunting and isn’t “viable for home protection” in a tweet promoting gun control proposals.

Sen. Dianne Feinstein (D., Calif.) and Sen. Chris Murphy (D., Conn.) penned an op-ed in TIME calling for the banning of AR-15s and similar assault weapons.

“Guns like the AR-15 aren’t used for hunting and they’re not viable for home protection. They have only one purpose, and that’s to fire as many rounds as possible, as quickly as possible,” they wrote. “Outlawing these weapons, an action supported by 60 percent of Americans, will bring down the number of mass shootings and reduce the number of casualties, just as it did when the ban first passed in 1994.”

However, the AR-15, the most popular rifle in America, is used for hunting and home defense. MRC-TV noted a poll showing more than 25 percent of hunters reported using the rifle to hunt big game. In addition, the rifle is popular for home defense given its light weight and limited recoil, making it easier for owners to handle.

It’s only good for shooting at multiple home invaders, and managing recoil while regaining sight picture quickly, and ease of handing, and so on, and cops use them all the time, but they are no good.

Every day is opposite day, I guess.  I feel like I’m listening to a child explain calculus.

Guns.com.

The competitor, Sgt. Benjamin Cleland of Swanton, Ohio, pulled off the feat at the National Rifle Association’s 2019 Charlie Smart Memorial Regional in Oak Ridge, Tennessee on June 2, with a score of 800-34x. This means Cleland not only notched 80 back-to-back hits in the 10-ring but that 34 of those nailed the even smaller “X” ring at the target’s dead center. For reference, at 600 yards, the 10-ring measures 12 inches while the “X” is 6 inches.

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The 80-shot course is fired in four stages. This begins by firing 20 rounds from 200 yards in a standing position, followed by 20 sitting/kneeling, rapid-fire rounds before delivering 20 rounds from a prone position at 300 yards. The final stage, at 600 yards, consists of a further 20 rounds. A perfect score is 800, or 10 points for each round in the 10 ring.

The previous high score with a service rifle was a 798 set by Marine Gunnery Sgt. Julia L. Watson.

Service rifles in the match are limited to M16s, M14s and M1 Garands with a maximum of a 4.5x power scope.

That’s 1-2 MOA shooting for 80 straight rounds, some of it rapid fire.  That’s extremely consistent shooting.  That’s something we should all be striving for.

From the comments, “And He spoke to his disciples, saying “nay, it cannot be direct impingement, for behold… there is a piston.” Thence He demonstrated the operation of Stoner’s rotating-bolt gas-key system, and they beheld his truth with their own eyes,” and “Saint Stoner of Armalite.”

Tim Harmsen of MAC had something similar a while back.

Shooting Illustrated:

What’s mechanical offset and how do you deal with it? If you have an optic on a firearm, particularly a rifle, the line-of-sight through the scope is higher than the center of the bore, and that difference is what we call offset. In other words, when you take a shot the bullet is going to exit the barrel as much as several inches lower than the line of sight.

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To check this out, you’re going to need about 50 rounds of ammunition and a target. I suggest you fire three-shot groups, holding center, from 3, 7, 10, 15 and 25 yards. I think you’ll discover that your rounds are striking somewhere around 2 to 3 inches low at 3, 7 and 10 yards. At 15 yards, the group will still be low, but a little closer to point-of-aim. At 25 yards, point-of-aim and your three-shot group should be pretty close to coinciding.

Next, try shooting those same three-shot groups at 3, 7, 10 and 15 yards again, but this time hold high to account for the offset you observed the first time around (remember, the 25-yard group should be close enough to the center to not warrant significant correction). If you hold correctly, you should end up with centered hits at each of the distances. One quick example might be holding 3 inches high at 3 yards. Continue to practice getting used to the various mechanical offsets by shooting snaps—one shot standing from ready—at each of the various ranges until you thoroughly understand your offset holds.

Travis Haley refers to this as “height over bore” in the Magpul Dynamics “Art of the Tactical Carbine,” which is a very good video series.  I highly recommend it.

If this matters to you in CQB, you should check out your correction on a short range.

If you don’t do anything else today, watch this video entirely.  It’s well worth your time. There is also information presented by Stoner that doesn’t fit the narrative, so it’s a good history lesson.

Do you think it would have been fun to have worked with him? I do.

Reader =BCE56= links Ballistic Pressure Wave Contributions To Rapid Incapacitation In The Strasbourg Goat Tests.

Chamberlin observed damage remote from the wound channel he ascribed to the hydraulic reaction of body fluids [CHA66]. Tikka et al. showed that ballistic pressure waves originating in the thigh reach the abdomen. Wounding and delayed recovery of peripheral nerves have been reported [LDL45, PGM46]. Pressure waves cause compound action potentials in peripheral nerves [WES82], and ballistic pressure waves have been shown capable of breaking bones [MYR88].

This shows that, all other factors being equal, bullets that produce pressure waves of greater magnitude incapacitate more rapidly than bullets that produce smaller pressure waves. The Strasbourg test data convincingly supports the pressure wave hypothesis and allows (perhaps for the first time) the fast response time to be modeled as a function of peak pressure wave magnitude.

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The trend in bullet design over the last decade has drifted toward bullets with little fragmentation and a higher percentage of retained mass. Bullets that both fragment and meet minimum penetration requirements create larger pressure wave magnitudes and offer improved incapacitation potential.

There is much more at the link.  I find it especially interesting that the authors use a 4*pi()*r^2 model for pressure wave solid angle (as with sound, light and radiation, unattenuated [or scattered] and unreflected).  The pressure wave isn’t forward peaked.

I often claim I have the best readers on the internet.  I really mean it.  This is a good example of that.

And this analysis goes to the heart of the design of the 5.56mm round, which is to induce a pressure wave due to high velocity (KE = 1/2 * m * v^2) and then fragment into shrapnel with multiple wound tracks.

Thanks to reader =BCE56= for that great read.