What thread size does the Pro-Shot 37-40mm Bore Mop use to attach to cleaning rods?

The Pro-Shot 37GLMP features standard American heavy bore #5/16-27 threads. It is designed to easily screw onto standard heavy-duty cleaning rods compatible with large-bore launcher maintenance.

Can this bore mop be used to remove heavy carbon crusting in my 37mm or 40mm launcher?

No, the cotton bore mop is not designed to scrub away heavy carbon buildup. You must use a dedicated phosphor bronze bristle brush to break up heavy carbon crusting before using this mop for final drying and oil application.

Will the Pro-Shot 37GLMP bore mop fit smaller calibres like 12 gauge shotguns?

No, this mop is specifically engineered for 37mm and 40mm platforms such as the M203 and flare launchers. It will not fit bores under 37mm, so separate gauge-specific mops are required for 12 gauge or standard rifle calibres.

Are there any electrical or regulatory safety certifications required for this product in Australia?

No, because the Pro-Shot 37-40mm Bore Mop is a completely non-powered, manual maintenance tool made of cotton and brass, electrical standards like SAA/RCM certifications and 240V plug requirements do not apply.

37mm Bore Mop - Pro-Shot 37GLMP

The Proshot 37-40mm Bore Mop is a dedicated launcher cleaning tool engineered to dry, swab, and lubricate large-diameter barrels. Built with 100% thick-fill cotton fibers woven around a solid brass core, this bore mop delivers maximum surface contact to wipe out residual fouling and excess solvents. When used with liquid lubricants or rust inhibitors, the dense cotton produces a foaming action to evenly distribute a protective film across the internal surface of the launch tube. The brass core and looped end prevent scratching on steel or treated launcher tubes, and the tool attaches via standard heavy bore #5/16-27 threads.

Key Features

100% Thick-Fill Cotton: Delivers high absorbency to wipe out leftover fouling, moisture, and chemical solvents from large bores.
Uniform Lubricant Application: Creates a foaming action with liquid oils to coat the entire internal tube diameter with a protective barrier.
Bore-Safe Brass Core: Features a solid brass core and looped ends to eliminate the risk of marring or scratching internal barrel surfaces.
Standard Thread Compatibility: Outfitted with American heavy bore #5/16-27 threads to connect directly to standard 10/12-gauge or launcher-compatible cleaning rods.
USA Construction: Manufactured in the United States for workshop and field maintenance applications.

Specifications

Category: 37mm 40mm bore mop
Platform Compatibility: 37mm and 40mm bore platforms (smoothbore and rifled)
Mop Material: 100% thick-fill cotton fibers
Core Material: Solid brass core with looped ends
Thread Interface: #5/16-27 threads
Operation: Manual maintenance accessory (non-powered)
Country of Origin: USA

Who is the Proshot 37-40mm Bore Mop for?

Law enforcement armourers — Requires a 37mm 40mm bore mop configured with #5/16-27 threads to reliably swab out chemical residues and apply rust-inhibiting oils inside 37mm and 40mm less-lethal launcher tubes.
Military personnel — Requires a heavy-diameter 37mm 40mm bore mop sized for 40mm grenade launchers like the M203 to rapidly dry launcher barrels after solvent cleaning without risking bore abrasion.
Permit holders — Requires a bore-matched 37mm 40mm bore mop that threads directly onto standard #5/16-27 cleaning rods to maintain 37mm flare and signal launchers against internal corrosion.

Less suitable for: Sub-37mm barrels such as 12-gauge (18.5mm) shotguns or standard rifle calibres, which require gauge-matched cotton bore mops, or heavy carbon crusting, which requires a 37/40mm phosphor bronze bristle brush prior to swabbing.

SKU	PS41265LP
Model #	37GLMP
Brand	Pro-Shot
Shipping Weight	1.0000kg

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Pro-Shot 37glmp Bore Mop 37mm 40mm Cotton

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