The Firearm Blog

I learnt from Caleb at Gun Nuts that Daniel Defense are launching a new AR-15. The Daniel Defense DDXV Carbine is an entry level version of the DDM4 which was launched earlier this year. The main difference is that the DDXV has a standard M4-style butt stock and plastic handguards rather than a fancy stock and rail system.

Daniel Defense DDXV

Daniel Defense are making a California specific version that requires a tool, in this case a bullet tip, to be used when changing magazines. This allows it to be Cali-legal, although somewhat decreases its utility as a self-defense weapon. The California version also includes a 10 round Magpul PMAG magazine instead of a 30 round magazine.

10 round Magpul PMAG. Same size as the standard 30 round magazine.

It will retail for about $1150 and should be available later this month.

“FREEFALLE7″, a Ranger Instructor, posted the above photo at AR15.com. A student, on arrival at the Swamp phase of Ranger School, showed him his M4 and said “my barrel fell off”. His punishment for not telling an instructor at the Mountain phase (the previous phase) about the broken M4 was to be given a M240, which weights 27 lbs, as a replacement.

Keith J came up with a plausible theory of how this happened

Salt water in the threads. Steel rusts. Steel in contact with aluminum. Aluminum then oxidizes, reducing the rust to iron dust. Joint remains tight until it is abused, then it just falls apart.

This all started when the barrel was installed and it was tightened a bit too much, causing the anodizing to crack

Of course this would have happened over a long period of time and use.

Thanks to Jay for the link.

Caleb got thinking about bolt action rifles and noted that no bolt guns exist to his knowledge that can feed from STANAG (AR-15 / M16) magazines.

everyone seems to be talking about how the world/economy/social order is going to collapse soon (it’s not) I figured the best rifle for that collapse would be a bolt action .223 with an 18 inch barrel, forward mounted optic, back up iron sights, and the ability to feed from standard AR15 magazines.

This got me thinking and I could not come up with one that did.

My artist impression of what such a Remington 700 would look like.

The Australian AIA M-10 “5th Generation” Lee-Enfield rifle comes in 7.62×39mm and feeds from a AK-47 magazine. The one pictured below is being sold on gun broker. Not many are available in the USA because after it was found out that some parts of the rifle (maybe the whole) was manufactured in Vietnam, they were banned.

While 30 round magazines are not as practical on a bolt action as they are on a semi-automatic, magazine parity with the AR-15 would be a big bonus. Remington and Ruger are you listening?

dfwgun @ ARFCOM posted a short tutorial on how to modify a Magpul MOE AR-15 pistol grip so that it will fit on an AK.

As you can see in the photo some dremel work is required but it is a pretty straight forward procedure.

Guess how much this Knights Armament muzzle break sells for …

Photos by unclemoak @ ar15.com

The Answer: About $450!

The muzzle brake is made from one of the Inconel family of nickel-chromium superalloys and claims 40% reduction in recoil.

Thanks to Jay for the link.

Last month a Californian resident was granted a patent application for a wooden hunting style stock for the “M-16/AR-15″.

Photo from the patent

Of course as you can see in the photo the rifle is not a AR-15/M16 as the patent claims. It has a forward recoil system and only the Para USA Tactical Target Rifle (previously know as the ZM LR300) has such a system.

I cannot see how this is an original invention. All he has patented is a standard rifle stock replaces the the pistol grip. The patent system is severely messed up.

Still, I must say I like his laminated stock and handguard in the above photo. I think it looks pretty nifty.

Thanks to the ever vigilant Daniel Watters for sending me the patent info.

UPDATE: It is a patent application not a patent. Lets hope a patent is not issued. Thanks for the correction.

In March Brownells were awarded a contact for 1.4 million M16 magazines. They have just shipped the first 60,000. Interestingly these have a new propriety anti-tilt follower, instead of the normal green follower.

The new military magazine manufactured by Brownells

Larry, from Brownells, told me that the follower will unfortunately not be available to the civilian market as part of the contact prohibits them from using the design for any other purpose than the military.

Murdoc has written a review of the Adam Arms retrofit piston system for the AR-15 for Guns and Hunting.

The new Adams Arms gas block quickly mounted with hex screws and a new bolt carrier key, a couple springs and a bushing were all that was needed before adding the sleeved drive rod. Supplied front handguards mounted normally, and I was left going back over the installation manual, convinced that I must have missed something. It was that easy. Though it took me more than half an hour due to the troublesome factory gas block, this is certainly a task that can be accomplished by a moderately capable gun owner.

It is a well written review and worth reading.

This 3D animation shows how the piston system works verses the AR-15’s normal method of operation, direct gas impingement.

The fact that guns get dirty is is one of those unfortunate facts of life, along with death and taxes.

A piston operated gun will reduce the dirt that enters the rifle compared to a direct gas impingement gun (AR-15). When you add a suppressor, I think it makes little difference what type of gas system your rifle uses, it is going to get very dirty!

From the patent of an early model MP5SD suppressor.

A suppressor works by slowing down the gas through a series of baffles. The slower moving gas makes less noise as it is vented out of the can (can = slang for suppressor). The downside is that on a autoloading firearm once the action cycles and the spent cartridge is ejected there is more pressurize gas in the system than there would be without a suppressor. This gas, along with carbon, dirt, unburned power, is vented into the rifle action. Without a suppressor this still happens but the pressure inside the barrel is lower because the gas is vented faster.

“new-arguy” posted photos at AR15.com of his HK 416 upper (piston AR-15 upper), which had a AAC 416 suppressor attached, after firing 2000 rounds without cleaning.

This is my HK 416 upper, I ran it with an AAC 416 silencer at the last Magpul Dynamics class here in St Augustine. 2 days, 2000 rounds. I only took the silencer off the start of day 2 for a few drills, I would guess about 150 rounds. All the rest were with the can. I dropped some lube in the gun at the start of the class, aside from that, no cleaning, no oil, nothing at all. No problems either, well, not really. I will admit, I have run regular DI guns like this without problems, but I needed to keep dumping oil on the bolt group. In fact, one of the guys who works with me ran his Noveske N4 with a AAC M4 2000 right next to me the whole class. His gun ran fine as well, but he did keep dumping lube into the bolt carrier.

Anyway, the gun was fiilthy. I have never cleaned a gun that was so dirty. Grime and crud was seeping out between the upper and lower trying to escape. It is worth mention that a large piece of carbon built up and fell under my trigger group toward the end of the second night. I thought it was a primer, but when I opened the gun up and shoot the lower, it was plainly a piece of carbon. So technically, the gun did comletely fail. I have seen this same thing happen one other time, in another Magpul class (actually the one from the last DVD). My friend Derek was running a gun with a can on it for about as many rounds. Same thing, crud kept building up until some of it found its way under the trigger group.

bigbore, of adcofirearms.com, posted photos of his AK-74 rifle after firing 2000 rounds of corrosive ammunition using a suppressor and leaving it sit for a week.

After leaving it sit for a week, the bolt rusted into place and it was no more than a club.

A problem with some of the now discontinued Ruger Police Carbine and Marlin Deer Camp, blowback autoloader pistol caliber carbines, was that their actions got very dirty. A pistol in the same caliber with a 4″ barrel would vent gas much faster than a 16.5″ barreled carbine.

Ruger PC4 (Police Carbine .40 S&W).

There is no substitute for cleaning your rifle. If you are considering a suppressor this is something to take into account. Bolt/lever/single shot action rifle with suppressors will not have this problem. The gas will be vented before the action is manually cycled. I personally have not had any problems with .22 semi-autos rifles with suppressors, nor have I heard of anyone having problems.

Many thanks to Jay for emailing me the link to the photos.

I have blogged before about cameras being mounted on rifle stocks. SayUncle found this webpage showing a camera mounted on an AR-15 lower.

This is an incredibly bad idea. Not only could people could easily it for a gun-like weapon, but an AR-15 lower is legally a firearm. I doubt the cops would be very happy about it being waved around in a public space.

“PooFire” was using his car as a barrier to practice shooting over (NOT a good idea) with his AR-15 but forgot his revolver was placed on the car roof. His S&W Model 442 Airweight took a 5.56mm bullet to the chamber.

Click to expand the images.

He knows what he did was idiotic, and as someone at AR15.com said, he has balls of steel posting it on the internet. So don’t mock him for it!

Thanks to Jay for the link.

Linda from Remington emailed me this photo (UPDATE: or CAD rendering, thanks Erni) of the new AR-15 style Model 597 rimfire. More info on the rifle here.

Remington have announced a new addition to their line of Model 597 semi-automatic .22 rifles. The VTR (Varmint Target Rifle) is styled after the AR-15 and features:

Click to expand.

* 16″ target-style heavy barrels.
* A2 style stock or Pardus M4-style collapsible stock
* A2 Pistol grip
* Free float handguard
* 1913 Picatinny rail for optics.
* Black finish on all parts.

It is not clear if standard AR-15 compatible stocks and pistol grips can be attached. I will try to find out from Remington.

Two models will be available. The “Model 597 VTR 22LR with A2 Stock” model will MSRP for $445 (10 round magazine) and $479 (30 round magazine).

The “Model 597 VTR 22LR with Collapsible Stock” features a Pardus collapsible stock and had an MSRP of $445.

UPDATE: According to John, Product Development manager, different AR stocks should be compatible. AR pistol grip interchange will be limited because of the receiver design.

Thanks to Linda from Remington for her help getting me information.

Ruger was that attractive girl at high school who you wanted to love but she stabbed you in the back and you just could not trust her again. That was two decades ago. Sturm, Ruger & Company CEO Michael O. Fifer has listened us, the customers, and changed the company culture for the better.

There is no better illustration for this change than the Evil Black Rifle itself which has just joined the Ruger product offering. The slogan for the SR-556 is “a platform redefined”. I say it should be “a company redefined”. I present to you the Ruger AR-15, the SR-556:

Ruger SR-556

Ok, I will wipe the tear from my eye, be a man and shove my emotional outburst back down where it came from Onto the features …

The most significant feature is a new short stroke gas piston designed by Ruger. It shares the same benefits as other gas pistons system: a cleaner, cooler bolt carrier as the excess gas it vented out the gas block, far from the upper receiver. The AR-15 was not designed for a piston and retrofit piston systems can cause problems, for example the pressure from the piston operating rob can cause the bolt carrier to bind. It was been suggested that the Ruger bolt carrier is designed to mitigate this particular problem. Time will tell (I am no expert on this topic).

The chrome lined SR-556 bolt carrier.

Disassembly of the gas system.

Another feature is a four position gas regulator. The first position prevents any gas entering the piston system. This turns the rifle into a single shot which requires the bolt to be manually cycled between shots. The next position allows the normal quantity of gas into the piston system to cycle the bolt. The next two position each let in more gas than the previous system which can help when the rifle is dirty or the ammunition is low powered. It is a compelling feature for reloaders because it gives them a greater range of adjustment for thier powder loads.

Chromed gas regulator.

Gas regulator positions.

The rifle also features:

* Full length Troy Industries Quad Rail with rail covers.
* Hogue Pistol grip.
* Ruger branded Troy Industries flip up Backup Iron Sights (BUIS).
* Ships with three 30-round Magpul PMAG magazines.

Ruger branded Troy Rear Sight

The Specs:

Caliber: 5.56mm NATO / .223 Remington
Barrel: 16.12″
Barrel Twist: 1:9 Right Hand
Weight: 7.92 lbs
Total Length: 32.75″ - 36″ (depending on stock position)
Stock: 6 position M4 style

It is nice to see Ruger has explicitly said .223 Remington AND 5.56mm NATO are compatible with the rifle.

The MSRP is $1,995. It is expensive and you could build one your self from parts for less, but if the gas system works flawlessly then I think it will be a good seller. I think it will sell for about $1800 on the street.

Here is the Ruger promotional video. They seem to be keen to promote it to law enforcement and military:

GunBlast.com made this video showing the rifle in action:

This photo is from Snowflakes in Hell. For the high resolution version and many more photos as well as on the ground reporting from the launch visit Snowflakes in Hell:

This photo Adam’s Incoming blog. For many more photos check out the Guns and Hunting Incoming blog.

More information about the rifle is at Caleb’s Gun Nuts Media blog.

Thanks to y’all who emailed me about the SR-556. I appreciate it. Contrary to popular belief I am not dead just slow and overworked.

SayUncle reported that Bison Armory are selling new 6.8 SPC AR-15 upper recievers. From BisonArmory.com:

We just got our 18″ and 20″ 6.8 SPC barrels today! I’ve put together the first upper for testing. It’s a 20″ with unthreaded muzzle. Pictured below is the upper with a Young Mfg. Match bolt carrier, YHM lightweight four-rail rifle length hand guard, and YHM A3 flat top upper receiver. The upper also features an intermediate-length gas system, YHM low profile gas block, and YHM forearm end cap.

These photos of the uppers were posted on 68forums.com:

The first upper is the most basic, 20″ with threaded muzzle, Phantom .308 FH, Bushnell 3-15×50 scope and rifle length gas system. The second one is the 20″ unthreaded with intermediate-length gas system.

The first upper in this photo is an 18″ with a Saylors Machine Phoenix FH and mid length gas system. The bottom one is an 18″ with a TNW gas piston system and DPMS Levang linear compensator. I’m really looking forward to trying out the GP system.