5.56 Timeline

“Solvent traps” LOL

I was surfing the web and I stumbled across this picture. On that MP5, mounted to the lugs on the barrel, is a “Solvent Trap” with an oil filter on it.

I forgot those things existed. I’m pretty sure I posted about them not long ago.

When we clean a gun, pushing or pulling a brush with solvent on it will result in the brush spraying some of that solvent and crud around when it exit the bore. (What I usually do is forget about this fact of nature, and run a solvent soaked brush though a bore while I’m wearing a good shirt standing next to white drywall) I am reminded of a particular annoying bench rest shooter at the range I used to work at would clean his rifle after every match. He would use a jag, push a patch through the bore and let that dirty patch fall to the ground to get blown away by the wind. After a match, after he cleaned his rifle, there would be a good 30-50 plus patches blowing around the range. Had it been up to me, I would have banned him from the club over intentionally making a mess each weekend.

Someone came up with the idea of selling a clear plastic tube with plastic end caps you could slide over the muzzle of your rifle. That way, when you were running a brush or pushing patches all the trash and splatter would be contained in the easily cleanable clear tube.

Tipton sells something similar that uses a soda bottle.

Now, I don’t know what came first. Someone realized you could use an oil filter as a cheap silencer. Someone realized you could use an oil filter as a “solvent trap”.

For example, Cadiz Gun Works sells Oil Filter Silencers for $85. Now, since the oil filter is part of the silencer, when you want to replace it, you need to ship this silencer back to the manufacturer, CadizGunWorks, who will replace the filter and charge your $25.

Come on guys, you can’t post a better picture of your product?

As for the oil filter “solvent traps” since they are a cleaning tool, and perfectly legal as is, you can buy one and have it shipped to your door.

For example, Infinite Product Solutions, sells a “Three Stage Adapter” with three different thread sizes so you can mount an assorted variety of various filters or mufflers to function as a “solvent trap”.

There is an ATF letter floating around talking about this:

ATF letters only apply to whom ever asked the ATF the question. But if you fall into the same situation, you will likely get the same result. Not always. This letter states that if you or I decided to use a Form 1 and turn an adapter into an oil filter silencer we would not be allowed to swap out the oil filter with out submitting a new tax stamp.

So if you are thinking about registering an oil suppressor, it might be a poor value for the cost.

I imagine that in a SHTF type situation, items like oil filter silencers might be a little more popular.

Might not want to use them on larger calibers or weapons you plan to do higher volumes of fire. Many of these filters use a fibrous medium that might catch fire if overheated.

People have been arrested and prosecuted for using illegal oil filter silencers. Here is one example: https://www.guntrustlawyer.com/maryland-man-arrested-fuel-filter-silencer/

At this point I’ve rambled for a while, and I’m not sure if I ever had a point. But here is a fun aside:

Maverick Precision sells “Solvent Trap Filter Media

These “Mil-spec filter media designed to catch carbon & other contaminates” are sold $50 for a pack of 10.

I think those look familiar. Look at the 3 slits cut in each round patch. Like cleaning patches…

Now look at those round patches with 3 slits cut into them. These Otis patches are sold for $7.49 for 100.

I’m sure that Maverick Precision would never take a 7.5 cent cleaning patch and sell it for $5. Right?

3D Printed AR15 Autosear

DISCLAIMER: We did not make this part or know the people who made it. Person who made this video is properly licensed to manufacture NFA components.

“This video is provided by an FFL with proper authority to manufacture machineguns. The FFL has requested they not be named but has approved release of this video.

This is an autosear that functions like a swift link (disconnector manipulation). It is printed in PLA, and was deisgned by FreeMenDontAsk, the same fellow who has done many different printable pistol frames as many are familiar with.

This sear worked issue free for 200 rounds and counting, but is showing signs of wear. “

” It will be shared for educational reference on Deterrence Dispensed various distribution channels once testing is done “

screen shot from video showing the parts.

3D Printed AR15 Autosear ($0.50 of biodegradable plastic) – Reupload due to Reddit bugginess from r/guns

Chatter 20190928

Everything is better with an ACOG.

Had a hard drive fail in my personal computer. Making for lots of annoying delays.

I picked up some Zenitco rails for my AK. They are awesome. Also kicked my ass trying to get them installed. Not quite drop in. I’ll go into details some other time. Lots of time was spent with a hammer ~gently~ fitting the parts.

Previously I’ve told people that a FN SCAR rear sight will not work on an AR15 due to height issues. I’ve had several people since then tell me that I was wrong. Not wanting to put out bad information, I found another SCAR sight to give it a try. I was able to zero this one, but the front sight had to be cranked up rather high. So it is possible. I don’t know if there was something wrong with the previous sight I had, or if it was just tolerance stacking, but it was not possible to zero the other one. Still this front sight is high enough I was a little concerned about it coming out while I was making the adjustment. Might be worth running a taller front sight post if you ever run a SCAR rear sight.

Still, now I know it is possible.

Some of the yahoos over at ARFCOM were implying that shooting a M203 one handed would be impossible, or it would be possible, once, as you would injure your self. I’m pretty sure those are the same “experts” that will tell you that a near miss from a .50 BMG will rip a person to pieces, that a .223 round tumbles end of end in flight, and that the world is flat.

I made up some chalk round reloads with blue chalk. At the end of the range session, a very tired and shaky me taped my self firing off a round one handed.

Note the lack of any yelps of pain or nor any sounds of snapping bones.

I was doing a bunch of AK shooting today. Was shooting right handed and feeling like a badass with the rifle. Uber-competent. When I started doing the left handed AK shooting my confidence was put in check. Left shoulder wasn’t used to the shape of the AK buttstock and was uncomfortable. The great recoil control I had shooting right handed was absent while I was shooting left handed. I don’t even want to admit how slow and awkward the reloads were.

Now I know what I need to work on more.

The P80 I built the other day worked well enough. Only issues came from cases sticking in the chamber of the .22 kit. Due to how the threaded barrel is set up on that, it is a pain in the ass to clean the chamber. I must not have cleaned it well enough the last time I used it some years ago.

Look at that terrible left handed iron sight AK shooting. Slow and rapid fire from 7-50 yards. Look at that shot in the hair line and the one the cheek. At least I figure I shouldn’t get worse with practice.

I was feeling pretty cocky after the right handed slow and rapid fire. I should have taken a picture of my first 5 shots slow fire. At 50 yards with the iron sights I engaged a target like the one shown above. I felt all shaky and slow. For the 5 shots I raised the weapon, quickly got a sight picture, and fired. When I inspected my target, 4 of the 5 were in the T, one just outside it. I was feeling pretty good after that.


I’ve designed a 40mm projectile where I would 3d print the exterior, then fill it with wax for cheap weight. I haven’t made any yet, so I don’t know how it will work out. I worry that the 3d printed exterior might not be water tight enough to keep the molten wax from flowing out. I’ll find out.

Lastly, I just learned about the Hensoldt ZF 3.5-26X56 Riflescope. While it doesn’t have locking turrets or any sort of rotation indicator, it still seems like it would be an ok scope. If one of you were thinking about buying me a Christmas present, keep that in mind.