The science behind Unit 1
Performance begins at the molecular level. Our chemistry is engineered for real-world firearm and industrial use, not lab theory.
Every formula in the Unit 1 range is built from ground-up principles of inorganic chemistry, lubrication science, corrosion control, and material compatibility. Built for results.
This page explains the science behind our products and why Unit 1 Lubricants delivers performance you can trust.
Our approach to chemical engineering:
Research-driven formulation.
Each Unit 1 product begins with research into the underlying chemistry, from surfactant systems to solvent polarity to metal-surface interactions.
We design backwards from the problem, not forwards from marketing.
Real-world testing.
Every formula is tested repeatedly on actual firearms, industrial parts, and metal surfaces.
Heat, fouling, dust, humidity, recoil vibration – if it can’t survive the real world, it doesn’t ship.
Material compatibility.
We engineer our gun care range for compatibility with stainless steel, polymer, aluminium, and 4140 chrome-moly firearm steel.
Our products are safe for use on various finishes, including Parkerising, Cerakote, nitriding and bluing.
No guesswork. No damage. No surprises.
Firearm propellant chemistry...
From blackpowder to smokeless propellant:
A brief look at the science of carbon fouling.
In 1884, French chemist Paul Vieille revolutionised modern firearms by inventing the world’s first practical smokeless propellant, known as ‘Poudre B’ (‘Powder B’). Before Vieille, shooters relied on black powder – a dirty, corrosive mix of charcoal, sulphur, and potassium nitrate that produced massive clouds of smoke, heavy fouling, and inconsistent pressures. Naturally, Vieille’s breakthrough changed everything.
The chemistry behind smokeless powder.
Vieille discovered that nitrocellulose (cotton or cellulose treated with nitric and sulphuric acids) could be transformed into a stable, energy-dense propellant when:
- Partially nitrated (to control burn speed)
- Gelatinised with solvents like ether and alcohol
- Rolled into thin sheets
- Cut into flakes or grains
This new material burned progressively (surface area increases as it burns), producing:
- Far higher energy output
- Far less smoke
- Far cleaner operation
- Reduced fouling
- More consistent pressures and stable trajectories
In short, Vieille’s chemistry marked the birth of modern ballistics.
Why it matters today.
Every modern firearm, from handguns to precision rifles to artillery, owes its performance to Vieille’s invention.
Smokeless powder enabled:
- Higher velocities
- Smaller cartridges
- Stronger metallurgy
- Cleaner operation
- Repeatable accuracy
It was the moment firearms left the 1800s behind and stepped into the world we recognise today.
While smokeless propellant burns cleaner than blackpowder, every shooter these days know, it’s not ‘perfectly’ clean-burning. Each time a round is fired, carbon residue builds up on:
- Bolt faces
- Carriers
- Slides
- Rails
- Locking lugs
- Feed ramps
- Chambers
- Barrels
- Gas system
Carbon attracts moisture, traps unburnt propellant, and forms a hard, abrasive layer that causes:
- Friction
- Premature wear
- Rust formation
- Cycling malfunctions
- Feeding/extraction issues
This is why cleaning your firearm from carbon is so important. After all, if you take care of your firearm, your firearm will take care of you.
Copper fouling... fact or fiction?
Copper fouling isn’t a myth, an exaggeration, or a marketing trick – it’s a physical reality of how modern firearms work.
Every time a copper-jacketed bullet travels down a barrel, microscopic layers of that copper are shaved, smeared, and bonded onto the steel through heat, pressure, friction, and gas cutting. Over time, those microscopic streaks become measurable deposits, and those deposits change the internal geometry of the bore.
Copper fouling affects:
- Pressure (it raises it)
- Accuracy (it shifts it)
- Heat (it amplifies it)
- Consistency (it destroys it)
This isn’t fiction… it’s physics.
Copper is softer than steel, and the forces inside a barrel guarantee it will plate, build up, and interfere with performance.
Removing copper isn’t ‘optional’ maintenance – it’s a critical part of keeping your firearm safe, accurate, and predictable.
How often should you remove copper fouling?
Copper fouling isn’t the same for every firearm. How quickly it builds up depends on:
- Caliber
- Barrel length
- Barrel steel hardness
- Bullet jacket alloy
- Velocity and pressure
- Rate of fire
- Heat
- Rifling type
- Precision versus general shooting
But here’s a simple rule:
Copper fouling forms faster than most shooters realise… and accuracy drops long before the barrel ‘looks’ dirty.
So here’s how to know when it’s time…
How to know when the time is right for cleaning up copper fouling:
Signs you need CopperSol™ and CleanShot™ now:
- If you’ve ever wondered when the time has come for copper fouling removal, we’ve provided you with the information you need to make an informed decision. This section explains everything you need to know to keep your firearm free from copper fouling, accurate and within the safe, high-performance limits of its design.
Precision rifles and hunting rifles
These rifles foul the fastest because of:
- Higher velocities
- Longer barrels
- Thin jacketed bullets
- The use of monolithic or solid copper projectiles
- Tight tolerances
Clean copper fouling every 20-40 rounds, especially with .308, 6.5mm Creedmoor, .300 Win Mag, .223 precision rifles. Hunters often notice their groups opening up after a single range session.
High-end rifles benefit massively from regular copper removal because fouling affects:
- Cold bore consistency
- First-round impact
- Group size
- Vertical stringing
- Pressure spikes
Semi-automatic rifles (ARs, LM5, AKs, Pistol Calibre Carbines or PCCs)
Semi-automatic rifles tend to exhibit copper fouling differently, because of:
- More heat
- More carbon
- Less time between shots
- More gas cutting around the bullet
Clean copper every 100–200 rounds, depending on your ammunition and barrel material. If the rifle starts shooting left/right or opening up groups, copper is usually the reason, it may not be your optics or the zeroing-in of your rifle itself.
Handguns (9mm, .40, .45, etc.)
Compared to high-precision rifles, handgun barrels are:
- Shorter
- Lower pressure
- Lower velocity
Because of their deign limits, handguns will tend to accumulate copper fouling slower than, say, a high-powered rifle, but this doesn’t mean that fouling in a handgun barrel won’t happen.
Clean copper every 300–500 rounds, especially if you shoot:
- Jacketed bullets
- High-pressure +P ammunition
For carry guns, a clean bore equals a predictable Point of Impact (POI).
Competition Shooters/high round count users
If you’re shooting:
- IPSC / IDPA
- 3-Gun
- Steel Challenge
- High-frequency shooting on training days
The heat and friction from this use alone will build copper fouling more aggressively.
Clean copper every 300–400 rounds or immediately if accuracy drops. For competitive shooters, consistency is everything, because even small levels of copper fouling results in accuracy shifts that matter.
Duty/tactical users
Police and military carbines, duty pistols, and EDC firearms should ALWAYS have predictable ballistics. Copper fouling can shift POI enough to matter in a real-world scenario.
Clean copper fouling from the inside of these firearm barrels after every duty shooting session, and for sidearms, every 150–200 training rounds.
Signs you need CopperSol™ Copper Fouling Remover
and CleanShot™ Neutraliser, right now:
If your barrel shows ANY of these tell-tale signs… you’ve got copper fouling:
- Groups suddenly opening up
- Shots walking left or right
- Random flyers
- Bore has shiny blue streaks
- Patches come out blue/green
- Increased recoil impulse
- Higher perceived pressure
- More heat than usual
- Inconsistent cold-bore shots
Unit 1 recommendation:
- Remove copper every 100–150 rounds for general use
- Every 20–40 rounds for precision rifles
- Every 300–500 rounds for handguns
When you do, you will immediately:
- Get more consistent groups
- Restore true bore geometry
- Protect your barrel from pressure spikes
- Maintain predictable point-of-impact
- Extend barrel life
We recommend a thorough CopperSol™ Copper Fouling Remover and CleanShot™ Neutraliser cleaning cycle for full copper removal.
Engineering polymers in modern firearms
Modern firearms rely heavily on engineering-grade polymers – advanced plastics designed to be stronger, lighter, and more durable than traditional materials. These polymers aren’t the brittle plastics of the past. They are high-performance structural materials engineered to withstand heat, impact, recoil, moisture, and long-term stress.
The most common firearm polymers include:
- Glass-Filled Nylon (Nylon 6/Nylon 66)
This is the industry standard. Strong, stiff, heat-resistant, lightweight, and extremely impact-tough and is used in frames, stocks, and grip modules.
Polycarbonate blends
- Very tough, excellent shock resistance, good dimensional stability
- Used in transparent magazines and accessory housings
Polymer blends with fibreglass or carbon fibre
- Enhanced stiffness and reduced flex
- Used in high-performance pistols and precision rifle stocks
High-Density Polyethylene (HDPE) & Polypropylene (PP)
- Highly chemical-resistant, tough, and durable polymers commonly used in the firearm industry.
- PP is often used in magazine bodies and followers, while HDPE appears more in stocks, grips, spacers, and storage components.
- Their excellent resistance to oils, solvents, and cleaners makes them safe around most gun-care chemicals.
These materials offer the perfect balance of strength, weight reduction, corrosion resistance, and durability, which is why modern firearms from popular manufacturers rely on them extensively. Of course, what goes into these polymer blends exactly, is a trade secret.
And because these polymers are engineered to withstand chemical exposure, temperature swings, and mechanical stress, Unit 1 formulations are designed to be polymer-safe as far as possible, as our CarbSol™ Polymer Plus Carbon Cleaner for polymer gun parts is formulated without the use of damaging or harsh solvents, ensuring performance without degradation.
Polymer-safe care
Firearms with polymer components require a different maintenance approach. Even the toughest polymers have microscopic spaces between their molecular chains, and aggressive solvents can seep into these gaps. Once inside, they disrupt the polymer’s internal balance by swelling the material and loosening the intermolecular bonds that give it strength. Over time, this can rearrange or break cross-links, weakening the structure from the inside out. What looks like harmless surface contact can silently lead to softening, warping, or long-term failure of the polymer component.
Certain solvents can:
- Penetrate polymer chains
- Cause micro-fractures
- Weaken structures internally
- Create whitening or clouding
- Lead to long-term polymer failure
Unit 1’s CarbSol™ Polymer Plus is engineered specifically for carbon removal from polymer-framed pistols and rifle furniture:
- Non-aggressive
- Zero clouding
- Safe for modern engineering polymers
- Breaks down carbon without damaging structureIdeal for: Semi-auto pistols, AR platforms, AK platforms, LM rifles
Ideal for: Weapons systems that use polymer structures in their designs.
CarbSol™
Hi-Performance Carbon Solvent
- Heavy-duty carbon fouling remover for steel components
- Breaks down carbon deposits rapidly, on contact
- Penetrates tightly-toleranced areas
- Ideal for slides, bolts, carriers, rails, feed ramps
- Safe for steel, nickel, Melonite, nitrided and Parkerised surfaces
Ideal for: Semi-auto pistols, AR platforms, AK platforms, LM rifles
Iron Duty™
Hi-Performance Gun Oil
High-performance lubrication and corrosion protection
- Low evaporation formula
- Maintains viscosity at high heat
- Does not gum in cold weather
- Forms a protective barrier against moisture and rust
- Designed for hard-use duty firearms
Ideal for: EDC pistols, competition guns, tactical carbines
CopperSol™
Hi-Performance Copper Fouling Remover
- Dedicated copper fouling remover
- Dissolves copper streaking inside rifling
- Restores accuracy
- Works fast and neutralises cleanly
- Non-corrosive when used correctly
Ideal for: All rifles and pistols firing FMJ ammunition
CleanShot™
Hi-Performance Neutraliser
The final step in barrel and component safety
- Copper removers are alkaline in nature
- CleanShot neutraliser resets barrel pH, protecting metal surfaces after copper removal
- Neutralises ammoniated cleaners
- Prevents flash rust
- Leaves components safe, stable, and ready for lubrication
Ideal for: Any firearm using CopperSol Copper-Fouling Remover
The UNIT 1
Cleaning System
Listed below is the Unit 1 cleaning system, a simple, effective, and tested process.
Remove carbon:
For polymer parts: Use CarbSol™ Polymer Plus
For steel parts: Use CarbSol™ Carbon Solvent
Eliminate copper fouling:
- Use CopperSol™ Copper-Fouling Remover
Neutralise and stabilise:
- Use CleanShot™ Neutraliser after CopperSol™ or after Unit 1 solvent and cleaner use
CleanShot™ redistributed evenly using a clean, heavily-soaked cotton patch
Lubricate and protect:
- Iron Duty™ Gun Oil applied lightly to the inside of the barrel immediately after CleanShot™, and to all friction points
This system protects your firearm from:
- Rust and corrosion
- Both carbon and copper fouling
- Unnecessary wear
- Accuracy loss
- Malfunctions
Frequently Asked Questions
Q: Is CarbSol™ Polymer Plus safe for all firearm polymers?
A: Yes. It’s engineered for modern firearm engineering polymers as it’s acetone and harsh-solvent free. However, since Unit 1 won’t know what exactly goes into each firearm manufacturer’s polymer blend formula, we encourage you to test CarbSol™ Polymer Plus on a small, inconspicuous part of your firearm and observe for any visible changes.
Q: How often should I remove copper fouling?
A: For handguns: Every 300–500 rounds
For rifles: Every 60–100 rounds depending on ammunition
Q: Can Iron Duty™ be used in extreme cold?
A: Yes. it has an anti-gumming formulation built in.
Q: Does CopperSol™ damage barrels?
A: No, CopperSol™ together with CleanShot™ is safe on steel, chrome-lined, nitride, Parkerised, and stainless barrels.
Product and technical queries
If you’d like more technical or product information regarding the Unit 1 range of products, please feel free to contact:
Elton Padia | Product & Technical | elton@unit-1.co.za
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