Description
The Ballistol FlexClean for .33-.38 caliber (8.5-9.5mm) firearms takes the fuss out of barrel maintenance. Instead of hauling out rods, brushes, patches, and a workbench, you drop the brass weight down the chamber, catch it at the muzzle, and pull the cord straight through in the direction you shoot. It works on anything in the .338, .357, 9mm, 9.3mm, .375, and .38 range, so one cord covers a good chunk of the pistols and rifles most folks keep around.
What Makes the FlexClean Cord Different
This version carries three rubber pressure balls separated by three woven sponge chambers. The balls are sized to press against the full inner surface of the bore, so they push fouling and residue out ahead of them while the sponges wipe things down. The design skips the brush entirely, which means no scraping or scratching on a barrel that just needs a quick wipe after range time. It's made in Germany and finished in gray with the caliber engraved right on the brass weight, so grabbing the correct cord off the shelf is quick.
Getting the Most Out of Your Bore Cleaning Rope
The sponges double as a little reservoir. A lot of folks put barrel cleaner on the front sponge and a touch of Ballistol oil on the back one, so you clean and protect in a single pull. It pairs naturally with Ballistol Liquid to neutralize and lift out powder residue, which is the stuff that does the real long-term damage to a bore. Works best when the barrel is still warm from shooting, not hot, and one or two passes usually does the trick.
A Reusable Tool Built to Last
The FlexClean is fully washable. When the balls and sponges load up with grime, warm soapy water brings them back, and the materials shrug off cleaning solvents and oils. It packs into a small transport box with a hanging tab, so it stashes easily in a range bag, truck console, or hunting pack for cleanup wherever you happen to be.
Key Specifications
- Manufacturer: Ballistol
- Manufacturer Part Number: 130334
- Model: BLL130334
- UPC: 760858130334
- Caliber Range: .33-.38 (8.5-9.5mm)
- Recommended Calibers: 8.5mm / .338 / 9mm / .357 / 9.3mm / .375 / .38
- Type: Pull-through bore cleaning cord
- Pressure Balls: 3
- Sponge Chambers: 3
- Weight Material: Brass, caliber engraved
- Color: Gray
- Reusable: Yes, washable
- Packaging: Boxed with hanging tab
- Country of Origin: Made in Germany
What’s Included
- 1 Ballistol FlexClean bore cleaning rope (.33-.38 cal / 8.5-9.5mm)
- Transport box with hanging tab
Frequently Asked Questions
Which calibers does the .33-.38 FlexClean rope work with?
This cord is sized for the .33 to .38 (8.5-9.5mm) range. Ballistol lists it for calibers including 8.5mm, .338, 9mm, .357, 9.3mm, .375, and .38, so it covers a lot of common pistols and rifles in that band. The caliber is engraved on the brass weight so you always know you've grabbed the right one.
Do I have to take my gun apart to use the FlexClean cord?
No, that's the whole point of it. You drop the brass weight through the chamber and barrel of your unloaded firearm, then pull the cord through in the direction you shoot. No rods, brushes, or fieldstripping required, which makes it great for a quick clean at the range or after a hunt.
Can I reuse the FlexClean bore cleaning rope?
Yes, it's built to be used over and over. When the sponges and rubber balls get grimy, just wash them out with warm soapy water. The materials hold up to cleaning solvents and oils, so it's designed to last.
Should I use it dry or with a cleaner?
It works dry, but you'll get better results pairing it with Ballistol Liquid. Many folks put bore cleaner on the front sponge and gun oil on the back sponge so the cord cleans and protects in one pull. For best results, run it through while the barrel is still warm from shooting but not hot.




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