.357 / 9mm Cotton Bore Mop – Pistol Cleaning Mop

20-Pack .357 Caliber / 9mm Cotton Bore Mop

In stock

SKU: MP-0001-357-p20

20-Pack .357 Caliber / 9mm Cotton Bore Mop

20-Pack .357 Caliber / 9mm Cotton Bore Mop

In stock

SKU: MP-0001-357-p20

$69.80

$59.33

Packs

Available Options

.357 / 9mm

$3.49

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⚠️ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Brushing gets the fouling loose - this .357 / 9mm cotton bore mop gets it out. Run it through soaked with solvent to absorb carbon and lead residue from your handgun barrel, then follow with a dry or oiled pass to finish. Fits 9mm, .38 Special, .380 ACP, and .357 Magnum - same bore diameter, same mop.

These four calibers account for the majority of handgun ammunition sold in the US - which means a lot of dirty bores at the end of the day. Most shooters brush and patch, but skip the mop step entirely. That's a mistake. A gun cleaning mop saturated with solvent reaches fouling trapped in the bore's surface texture that a dry patch slides right over. Thirty seconds with a mop is the difference between a bore that looks clean and one that actually is.

Wash and reuse - the 100% cotton holds up well across many bore cleaning sessions before the fibers thin out. If you carry a 9mm and keep a .357 at home, this one mop covers both in your gun cleaning kit.

Caliber:

.357 Magnum, .357 Sig, .380 ACP, .38 Special, 9mm

Product Type:

Bore Mop

Firearm Type:

Pistol, Revolver

Use Case:

Bore Oiling

Mop Material:

Cotton

Core/Stem Material:

Twisted Wire (Brass)

Bore Diameter (in):

0.357

Thread Size:

8-32

Pack Size:

10-Pack, 20-Pack, 3-Pack, 5-Pack, Single

Country of Origin:

Imported (China)

Brand:

GUNNIX

Use a bore mop labeled ".357/.38/9mm" - all three calibers share nearly identical bore diameters (.355"-.357") and use the same cleaning accessories. The mop uses standard 8-32 threading that fits any pistol or rifle cleaning rod. If you own both a 9mm and a .38 Special revolver, one bore mop covers both.

Reusable. Cotton bore mops can be washed with solvent or hot soapy water and air-dried between cleanings. Squeeze out excess solvent - don't wring aggressively, as this loosens the cotton from the stem. A single mop lasts through 15-20 cleaning sessions with proper care. Replace when the cotton no longer fits snugly in the bore.

Both serve a purpose. The bore mop holds more solvent and makes faster work of applying cleaner and absorbing heavy fouling - helpful after a high-round-count range session. Patches on a jag give you a clear visual of bore condition: if the patch comes out clean, you're done. Most shooters use the mop for the messy work and patches for the final inspection pass.

Yes. Cotton does not react with copper-dissolving solvents the way bronze brushes do, so any discoloration on the mop is genuine copper fouling - not a false reading from the cleaning tool. For 9mm and .357 Magnum shooters using jacketed ammunition, this matters: soak the mop in copper solvent, run it through, wait the recommended time, then follow with dry patches.

A bore mop can work for applying solvent inside cylinder chambers, but it may be slightly undersized for some .357 Magnum chambers. For better contact, use a bore mop one size up or a dedicated chamber mop. Carbon rings build up at the front of each chamber, especially if you shoot .38 Special in a .357 revolver - the shorter case leaves an exposed ring of chamber wall that collects carbon fast.

20-Pack .357 Caliber / 9mm Cotton Bore Mop

What size bore mop do I need for 9mm?

Are bore mops reusable, or should I throw them away after each use?

Should I use a bore mop or patches for my pistol?

Can I use a copper solvent with my cotton bore mop?

Do I need to clean my revolver cylinder chambers with a bore mop?