Home / Insights / Case Studies
Insights · Case Studies

Firearms: the whole action clean in one 15-minute cycle

Carbon, lead and copper fouling lifted from assembled actions at field-strip level — with the ultrasonic lubrication stage that returns weapons to service protected.

5 min readBy Misonics application engineers

Every discharge deposits carbon, unburnt powder, vaporised lead and copper wash through the action, barrel and cylinder — into tolerances no brush enters. This application study documents the ultrasonic armoury process: complete fouling removal in a 5–15 minute cycle, at scale, without disassembly beyond field-strip.

Industry
Law enforcement · defence · armouries
Components
Pistols, revolvers, slides, cylinders; brass cases
Contamination
Carbon · lead · copper wash · powder residue
Machine
Misonics MSX bench range, 40 kHz
Chemistry
Firearm cleaning concentrate
Cycle
5–15 min firearm · 15–30 min brass

The contamination

Carbon and powder fouling

Baked through the action, breech face, extractor and gas paths with every round — progressively hardening into deposits patches and brushes only polish.

Vaporised lead and copper wash

Metal fouling laid down in the barrel and cylinder throats at firing temperature — bonded to the steel, unreachable mechanically without wear.

The tolerance problem

Firing pins, extractors, springs and locking recesses foul inside assemblies. Ultrasonics cleans the assembled group at field-strip level — no detail strip, no lost small parts.

The process

Process diagram
LOADparts in basketSTAGE 1 · SONIC CLEANUltrasonic immersion40 kHz · max 55 °Cfirearm concentratefull fouling liftSTAGE 2 · RINSEWater rinseresidue & chemistrycleared from actionSTAGE 3 · SONIC LUBELubricant displacementultrasonic lube bathdrives oil intobearing surfacesSTAGE 4 · DRAIN + WIPEDrain & returnexcess drainedfunction checkRESULTverified & loggedThe lubrication stage matters: cavitation drives lubricant into the same tolerances the cleaning stage emptied — parts return to service protected.
ParameterFirearmsBrass cases (reloading)
Frequency40 kHz40 kHz
Temperature≤ 55 °C — protects finishes and polymers≤ 55 °C
Cycle5–15 minutes15–30 minutes
ChemistryFirearm cleaning concentrateBrass case solution
After-treatmentUltrasonic lubrication bathRinse and thorough dry before priming

The results

Complete fouling removal in one cycle. Carbon, lead and copper lifted from the assembled action — including firing-pin channels and extractor recesses no brush enters.
Armoury throughput. A rack of service weapons cleans in the time hand-cleaning does one — with the armourer supervising, not scrubbing.
Consistent, inspectable condition. Every weapon returns in the same documented state — a maintenance standard, not an operator outcome.
Brass recovered to reloading standard. Cases clean inside and out, primer pockets included, in 15–30 minutes.

Hardware and chemistry

Misonics MSX bench ultrasonic cleaner, lid open

Misonics MSX bench range

40 kHz bench units sized from single-weapon to full rack throughput, with lubrication-stage tanks for the complete clean-rinse-lube sequence.

Ask about armoury configurations →
Cleaning chemistry range specified at quotation

Firearm cleaning chemistry

Aqueous concentrates for carbon, lead and copper fouling, safe on steel, alloy and polymer furniture.

Browse the chemistry range →
The armoury argument: hand-cleaning quality depends on who held the brush. Ultrasonic cleaning is the same cycle, every weapon, every time — and the logbook shows it.
Equip the armoury

One bench, three tanks, a documented cycle

Book a cleaning trialSend fouled components — see the result before committingMSX bench rangeFrom single-weapon benches to rack-throughput stationsLaw enforcement industry pageThe wider sector application set
FAQ

Questions about this process

How far does a weapon have to be stripped?
Field-strip level only. Firing pins, extractors, springs and locking recesses are cleaned inside the assembled group, with no detail strip and no lost small parts.
How long is a cycle?
Five to fifteen minutes for a firearm and fifteen to thirty for brass, at 40 kHz and no more than 55 degrees C in a firearm cleaning concentrate.
How does the weapon go back into service protected?
An ultrasonic lubrication stage after the rinse drives oil into the bearing surfaces, then the weapon is drained and wiped.

Related: MSX benchtop machines · Armoury firearm cleaning · All case studies

What are you cleaning?

Tell us what the part is, what comes off it, and what it has to pass. Technical sales will tell you whether ultrasonics is the right answer for that part and what it takes to run it on your own floor.

Talk to an engineerMore Insights
Keep Reading

Next in the series

How ultrasonic cleaning works

The mechanism reaching inside the action.

Blind holes & galleries

Firing-pin channels are blind holes too.

Defence industry page

Related defence applications.