AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) – 1/2×28″ + 5/8×24″ Included


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The AD-4C Aircraft Grade Adaptive Solvent Trap is engineered with four Internal Radial Storage Cups (IRSC’s) and AD Space Connectors. This solvent trap has a Type III (hard-coat) Anodized finish used for Military Application. A modern lathwork design intended for a sharp look and maximum cleaning and storage configurability.

This kit includes a 1/2×28″ and 5/8×24″ thread mount, a 3″ tube extension, one sealed end cap, four Internal Radial Storage Cups, and the industry standard 1.375-24″ TPI Adapter. This kit includes a 1.375-24″ TPI, to keep things simple and streamlined. The AD Space Connectors provide more space for storage during transport and adapt to all 1.57″ OD AST models!


✔️ Consumer Protection & Info Tabs Below

Product images are for showcase purposes only. 

Available on backorder

The AD-4C Aircraft Aluminum Adaptive Solvent Trap™ (AST)  is a unique Internally Threaded Radial Cup and Connector setup that is like no other solvent trap cleaning kit on the market. As can be seen in the product images, one of the several benefits that AD-4C owners receive is added storage space to store solvents, cleaning clothes/patches, tool heads and more during transport. This allows for a more simplified and streamlined bore cleaning sessions.

The 1.375-24″ TPI tube thread allows this Adaptive Solvent Trap to adapt to a variety of muzzle adapters to expand the configuration options when attaching the solvent trap to the firearm barrel, such as using an aftermarket quick detach setup to simplify the the connection and disconnection of the solvent trap for quick cleaning. The storage Cup threads are also 1.375-24″ TPI. Rather than selling our adapters separately, we also includes the 1-3/16×24″ to 1.375-24″ Adapter, which allows for additional aftermarket muzzle devices and accessories.

One of the features that makes this Adaptive Solvent Trap Kit unique, are the configurable dividers or storage cups for a more innovative modular design. Unlike other solvent trap designs, the modular adaptive storage cups and the tube body, are separate. The user can decide how many IRSC’s and AD space connectors they wish to use during cleaning to adapt to their personal preference. This will depend on the firearm caliber and how much solvent the user requires during cleaning.

In its longest assembled transport configuration, this solvent trap is only 13.8 ounces and 9.25 inches long and only 5.1 ounces and a little over 3.375 inches in its shortest configuration (with a Thread Mount, Tube and End Cap Installed). This solvent trap model has a 1.57” Outer Diameter and 1.375” Inner Diameter. For those who want a shorter configuration, simply remove connectors and cups until you are happy with the configuration for your specific cleaning needs. When you receive this solvent trap, you will see it’s an Adaptive Solvent Trap Kit designed with performance and customization in mind.

Please see our “Additional Information” tab above for more product details. 

AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
Adam Carruth
June 19, 2021.
custumer of Armory Den for life. where do i start, well for one thing these people have custumer service covered on a legit level. the best hands down communication with me then any company has ever had. up until my first purchase amazon had that on lock. but Armory Den has them beat. And if your skeptical of the quality of material or machining. one time is all it will take for you to truely trust that every single purchase you make with them will be the best you can buy. The best business and people you will ever spend money with. I am a customer for life and that is a fact! truely greatful for a business that actually cares about the people they do business with. thanks yall god bless you!! Adam Carruth
AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
William Patterson
May 25, 2021.
Solid from website to my hand, top shelf As I shopped for the product, I kept returning to the Den website. Descriptions are clear, lots of good information, very good value. Ordering is simple, terms are straightforward. I had special shipping instructions, followed perfectly. Secure packaging. The trap is well machined, fits tight, and is nicely finished. The hand-feel has heft and is of quality. Extra care at every step. Thanks.
AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
May 15, 2021.
Great experience
AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
May 3, 2021.
They did the right thing! Let me just start with Thank you Armory Den! What exceptional customer service! Their response time to emails, is faster response time then the police department has where I live for 911 calls lol j/k. Seriously, they answered me on Sunday, morning and afternoon. No company does that! Also, I asked about a part I thought came with my order. I was ready to pay for it, nope, they sent them to me for free, and shipped on a Sunday! No one does that! I’m a customer for life! I even canceled an order I had with another company, just so I can buy from ARMORY DEN! My business motto is “always do the right thing l, no matter what” they obviously follow it also!
AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
Paul F
April 7, 2021.
This company is the real deal I was a little skeptical about ordering honestly. I hadn't heard much about armory den and could only find good reviews lol. But I took a chance and put through an order. Everything arrived as described and is awesome. Be aware that you may receive multiple shipments based on what you order. These guys respond fast and from what i have seen, produce quality products. They have my future business. I've put up similar reviews and given a recommendation on their FB page.
AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
Michael Whitehurst
February 14, 2021.
Great experience. Product can exactly on time, as expected. Very pleased with product. Very well engineered and good quality. Customer service is excellent. Answered all questions quickly and very informative about products. Will definitely be ordering more in the future
AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
Mike Perkins
January 19, 2021.
Great customer service. When the item I ordered was late being delivered by USPS, they stepped up to the plate and made things right. I would recommend this company to anyone who is interested in well made quality products. You guys rock! Mike
AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
January 13, 2021.
Very nice quality item and excellent customer service. Prompt responses to questions. Would highly recommend.
AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
Dwight Ramer
December 9, 2020.
Excellent customer service, go the extra mile to make sure you are satisfied as a customer. Would highly recommend the Den for any of your needs of there products,
AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included
December 4, 2020.
Great customer service I think of all the online retailers I have dealt with, these guys are truly set up for great customer service. They have gone way out of their way to make this buying experience more than great. Quick response to the needs of customers are rare today. Thank you for doing what other online realtors have just forgot to do. Taking care of the customer.

Additional information


Adaptive Solvent Trap Kits, All Solvent Trap Kits


Shortest Configuration Weight: 5.1 oz
Longest Configuration Weight: 13.8 oz
Shortest Length: 3.75"
Longest Length: 9.25"
Tube Length: 3''
Diameter: 1.57''OD, 1.375''ID
Cups: 4 Internal Radial Storage Cups (Modular)
Build Materials: 7075 Billet Aluminum
Finish: Type 3 Hard Anodize – Matte Flat Black (Solid)
Included Thread Mounts: 1/2×28" and 5/8×24" (.578×28, 9/16×24" are sold separately)
Compatible: Industry Standard Tube-Thread, 1.375”-24 TPI Adapter (TPI Adapter Included)


All Items are Type III Hard Coat Anodized:
(1) Sealed End Cap
(1) 3" Tube Extension
(1) Thread Mount (1/2×28")
(1) Thread Mount (5/8×24")
(4) Aircraft Grade Aluminum Internal Radial Storage Cups (Modular)
(4) AD Storage Cup Space Connectors
(1) 1.375"-24 (Male) to 1.1875"-24 TPI (Female) Adapter


9 Inch


1/2×28" + 5/8×24"


Compatible with Adapters that have a Thread Pitch of 1.375”x24 TPI or 1-3/16×24" (Included: Trilug/Booster Quick Connect TPI Adapter)


7075 Aircraft Aluminum


Please do not purchase products from our site before reading through our ATF Legal Den and our website's Terms & Conditions. Armory Den sells parts and products for solvent traps. Solvent traps are a “firearm accessory”. As a firearm accessory, they can be attached to the end of the barrel and with an adapter, as a cleaning accessory. Thus, they are not considered as anything other than an accessory because a bullet, or projectile, cannot pass through the tube without modification.

Solvent traps can be purchased legally without a Form 1. However, you cannot alter, modify, or redesign them into a device for muffling, silencing, or diminishing the report of a firearm without first filing and receiving back from BATFE an approved Form 1. Please be aware of the restrictions and regulations and those within the states you and/or your business reside. Only after getting the approved Form 1 back can you make any modifications to the product. A crime is committed if you make the alterations before obtaining the tax stamp. Felony alert! Don’t do any alteration or modifications to our products before getting the approved Form 1 back. Moreover, please ensure you have first paid the proper stamp taxes, as well as received back an approved Form 1 from the BATFE before purchasing any products from our website.

Armory Den disclaims any responsibility for your actions if you fail to follow these guidelines or any applicable laws. This includes Federal, state, county and municipal laws and regulations. We also cannot be responsible for any consequence, result, damage or liability following any modifications or work done on our product post purchase. (after the purchase) This includes third-party liability. No endorsement or recommendation of any alteration, work or modification to our product(s) are made by these statements. Any such alteration, work and/ or modification is executed at the sole risk and liability of the product owner. If you make a decision to make any alterations or modifications to our products, please be sure to FIRST READ, REVIEW & FOLLOW all federal regulations regarding NFA items. Please review again if you are not 100% clear after your first review of all federal regulations regarding NFA items.

We sell firearm cleaning kits for trapping solvent and accessories that can make the cleaning process easier and/or more efficient. Catching solvent is the purpose of a solvent trap kit, legally and mechanically. Discussing anything outside of our specific product specifications is something our company is unable to do. Please keep this in mind prior to on-going communication with our staff, or your messages may be ignored. Please do not purchase products from our site before reading through our ATF Legal Den and our website's Terms & Conditions.


Add To Care Package, Don't Need It


Legal Solvent Trap Cleaning Kits 

Foreign Purchase Warning for Consumers

As a consumer in the solvent trap market, it’s important to ask the right questions prior to purchasing online. You should understand why certain US solvent trap companies have been shut down, why others still operate, and which specific companies will continue to operate. You should also understand why those who purchase solvent traps overseas are visited by the ATF and receive a letter from the U.S government regarding illegal products they have ordered online from companies they believed to be legitimate. These questions are far more important, as opposed to saving a few dollars by ordering illegal solvent traps that are also made from weak diluted metal composites.

Illegal foreign solvent traps are permeating the US market, and a majority of them are illegal. These foreign solvent traps are not vetted, nor do these companies have U.S attorneys or former Special Agents and specialists to ensure legal solvent traps are being engineered for legal U.S purchase. These same foreign solvent traps contain inferior and diluted metals, and poor finishes. More importantly, they contain clear and unclear characteristics deemed to show ‘constructive intent’ by regulators. This is very important to understand when you shop around for solvent trap solutions.

Even legitimate U.S sources such as firearm and non-firearm auction sites, as well as broker and listing sites are littered with illegal foreign solvent traps sold by their subscribers who list them on these outlets. Even Armory Den products have been cloned and listed on these same reputable auction and listing sites. We process complaints to protect consumers, but it is extremely difficult to get timely a resolution and/or response. The reason foreign companies choose to clone our products with weak materials and illegal versions, are because we dominate search engines. **Armory Den only sells products via our website**

Armory Den is one of the most reputable and trusted solvent trap cleaning solution companies listed on Page 1 of Google, Bing, Yahoo and DuckDuckGo. Any company, counterfeiter, or scammer can easily create a Paid Advertisement in a matter of seconds, but being listed on Page 1 of organic search results takes time, reputability and long-term investment. Companies with long-term views invest in such a thing. Google and other prominent and respected search engines will only show the most reputable companies who sell products consumers can trust, as well as relevant and reliable information.

Foreign companies will advertise their products as legal, simply because they do not know any better, and because they are not legally bound to U.S laws. To them you are a sale and a number on their analytics reports. If you happen to receive one of their illegal solvent traps, you may end up with a knock at your door from the ATF, and/or receive a letter from the U.S government – A risk and headache you don’t want!

Meanwhile, the foreign company who sold you the product will have zero repercussion. Overseas sales are monitored by the ATF through Customs, whether you believe it or not. There are also companies in the U.S who sell illegal solvent traps, simply because they do not understand what makes a solvent trap legal vs. illegal. These companies will eventually be shut down, and you don’t want to be listed as one of their customers!

This information is to help our consumers make a well-informed decision prior to purchasing a solvent trap online.


AD-4C Aircraft Aluminum Adaptive Solvent Trap (AST) - 1/2×28" + 5/8×24" Included



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