Posted on March 17 2019
I’m a 28-year Green Beret veteran (8 years boots-on-the-ground just in Afghanistan). My family comes from a manufacturing background.
And, I hate the AR-15. 
This sounds like an AA meeting for American veterans, so I better put up a decent argument soon before I’m lynched. Why does the AR suck?
It’s too complex. Any time you have a system that is complex, you have two results: efficiency and fragility.
In the military we are taught that the AR-15 is a fine weapon “as long as you maintain it.” In truth, the design works (80% of the time) in spite of itself, and has gone through so many design iterations that people have lost count. The history of the AR-15 is a history of band-aids.
From front to back:
- The front sight assembly sits ridiculously high because the straight (non-ergonomic) stock has to contain a massive spring and buffer assembly. If the weight or spring compression in that assembly is off just a small amount, it causes malfunction. This design flaw, right out of the gate, causes a huge mechanical offset where the eye lines up around three inches higher than the barrel. That’s why in 2019 you can’t find a new AR-15 with an old school front sight assembly.
- The gas tube is thin, fragile and subject to bending or breaking—usually taking the rifle out of commission.
- The star chamber and bolt face are perhaps the single biggest design flaw of the AR-15. That’s the eight-petaled flower at the front of the bolt. Flowers don’t belong in assault rifles. Some say the star chamber provides accuracy. It does not. Bolt-action sniper rifles don’t have star chambers. They have two or three lug bolts and they are the gold standard for accuracy.
Ask any soldier about weapons inspection and they will tell you the test is worming a pinky in the chamber of the rifle. The pinky never comes out clean and that should give us a clue. The single most important part of the rifle is nearly impossible to keep clean even in a garrison setting. Think about that for a minute: the point where the bolt, bullet, and barrel meet is almost impossible to keep clean in an AR-15.
The lugs on the bolt that lock into the star chamber are essentially a series of gears that if they don’t match up exactly, they cause a failure to feed or a failure to fire. Any number of things can cause the lugs not to pass efficiently through the star portion of the chamber: dirt, heat expansion, ice, wobbly bolt carrier or wear and tear. All can cause a bolt to seat incorrectly in the chamber, or not to extract after firing, causing a whole host of malfunctions. This is one of the reasons the forward assist was developed.
- The extractor, due to its design has issues because it is similar to a teeter-totter that is out of balance. This causes the extractor to want to slip off the rim of the casing causing failure to extract malfunctions. This is particularly evident when the chamber gets fouled from use in combat conditions. Almost all infantry soldiers carry cleaning rods to clear this brutal malfunction so they can knock a spent casing out of the chamber and get back in the fight.
- The bullet itself is a reliability issue. The 5.56 has a relatively long, slightly tapered casing which begs for issues disengaging it from the chamber. And, the casing has to move a long way to disengage. This becomes a monster issue if the bullet casing bulges during firing or if the chamber becomes excessively fouled, leading to failure to extract or half-extraction.
- There is no delay in the bolt moving during the extraction phase and this causes tremendous mechanical resistance. When the bolt carrier begins to move, it tries immediately to turn the bolt without first gaining momentum. If the bolt is stuck to the inside of the chamber due to fouling (or crap ammo like in Vietnam) then there is often not enough energy to knock the bolt back into rotation. There’s no “running start” to dislodge the bullet before turning the bolt. Almost all battle rifles, like the M14, M1 and AK use a delayed rotating bolt. The mass of the bolt carrier, once in motion, wants to stay in motion and hits the bolt like a hammer, knocking it into rotation and into extraction. Not so for the AR-15.
- Also, the steep angle of feed for the bullets has caused more than its fair share of failure to feeds. Overly-strong magazine springs, dirt, burs, or gunk can cause a bullet to hang up as it tries to climb the steep angle.Why do we only load 28 rounds into a 30 round magazine? Say it with me: BAND AID.
- The gas tube dumps carbon and debris into the upper receiver where the bolt carrier relies on a smooth surface to travel, which further exacerbates the tolerance issues with the star chamber. This has us running to piston-type band aid designs these days, as another attempt to fix a fatally-flawed concept.
- The hammer only goes to a 90 degree angle, which is ok, but does not take into account any mishaps, cold or weak primers, or a bolt that is not seated all the way.
- Magazines for the AR-15 used to be notorious for feed lips cracking, springs getting weak, and followers not putting bullets at the correct angle (which still happens with plastic mags all the time.)
- The bolt carrier does not ride on rails, and therefore wobbles as it travels back and forth in the upper receiver. This wobble is one of the contributing factors to the lugs on the bolt face not lining up for proper mating with the chamber—causing other failures to feed. This is another one of the reasons AR’s have a forward assist.
- If the buffer, buffer tube or buffer spring are out of balance, it leads to all manner of malfunctions. When I was at 1st SFG and we were first issued the M4 to replace the M16A2 there was no end of problems because the buffers were not the correct weight which caused weird failures to feed. Once the buffer weight was fixed we ran into problems with the buffer spring tension; more malfunctions. Then we ran into a buffer tube length problem. All of the three had to be working in harmony or we would be going to war with sexy-looking paperweights. Never mind if dirt got into the buffer tube…
I have probably made several AR-15 die-hard’s angry, and for that I apologize.
When all of these arguments are brought to bear, the inevitable retort is this: “If the AR-15 is so bad, why does the United States government use it?” Anyone who has been in the military can attest: we do lots of dumb things, and sometimes we do them for generations.
In testimony before the Senate Armed Services Committee, Maj. Gen. Robert H. Scales said, "American penchant for arming troops with lousy rifles has been responsible for a staggering number of unnecessary deaths…They died because the Army’s weapon buying bureaucracy has consistently denied that a Soldier’s individual weapon is important enough to gain their serious attention.”
Test after test fielded by the U.S. armed services demonstrate that the AR-15 has a litany of problems. These problems are much, much worse for non-professional soldiers such as citizen preppers. On the ReadyMan range, with regular folks appearing with their own AR-15 rifles, grab-bag ammunition, custom modifications and uneven maintenance, our failure rate for shooting ARs runs about 25%.
Granted: professional soldiers with training and dedicated time for rifle maintenance don’t experience quite such horrifying results with the M4, but preppers should beware: just because the U.S. military enjoys buying them, doesn’t mean the AR-15 is the right rifle for gardening one moment, defending your life the next.
If a Tesla car failed 25% of the time, we would lynch Elon Musk and duct tape him to one of his rockets. If our iPhones only worked “when well maintained,” we would’ve chucked them all off a bridge. If our pants failed 19% of the time they went into battle, we’d burn that manufacturer at the stake for being an unpatriotic cost-cutter. For some reason, we’re still buying from Colt.
(Editor's Note: Before you flame a 28-year Green Beret, please be so kind as to read the research attached below. Then, flame away.)
2007 Aberdeen Sandstorm Test. U.S. Army
http://www.warriortalk.com/archive/index.php/t-32165.html
10 Rifles. 60,000 rounds each.
XM8: 127 stoppages.
MK16 SCAR Light: 226 stoppages.
416: 233 stoppages.
M4: 882 stoppages. (3.5 times the second worst, which is also an AR-15)
2006 CNA Corporation Soldier Satisfaction Survey
https://www.cna.org/CNA_files/PDF/D0015259.A2.pdf
“Only” 19% of servicemen reported their M4 experiencing a stoppage during battle.
2014 “Secret Test” of M4A1 Carbine
https://www.washingtontimes.com/news/2014/aug/19/armys-quits-tests-after-competing-rifle-outperform/
Competing rifle outperforms the M4 and Army calls off the test.
"Troops left to fend for themselves after Army was warned of flaws in rifle"
Washington Times article, 2014
https://www.washingtontimes.com/news/2014/feb/19/troop-left-to-fend-for-themselves-after-army-was-w/
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