W&A Wesson Arms

Cleaning your S&W M&P after a wet weather range day

A wet range session can leave a Smith & Wesson M&P carrying rain, mud, grass, salt and abrasive grit. The problem extends beyond a dirty slide: moisture can linger around the extractor, beneath controls and inside the action. A careful cleanup removes contaminants before they cause corrosion or unreliable operation.

Routine care after a wet-weather range session should start with the firearm unloaded and follow the manual for that exact model. M&P pistols differ in calibre, frame size, sight and barrel configuration, while rail-mounted accessories add another layer. The aim is controlled disassembly, gentle cleaning and proper reassembly, not aggressive solvents or improvised repairs.

Australian conditions make that routine especially valuable. Sydney’s coastal air can carry salt into a case, while Melbourne’s cold drizzle often leaves clothing and benches damp. Regional ranges can add red soil, insect matter and heavy mud. Each responds better to prompt drying than to a heavier coat of oil.

Most recreational shooters must also meet their state or territory licence or permit rules, club rules and secure transport requirements. Whether travelling in a ute, using a boot rack or staying overnight in a motel room, the unloaded pistol should be cased and secured when not in use. NSW and Victoria both require unloaded, secure storage with ammunition separately secured; rules elsewhere differ in detail. Keep the muzzle in a safe direction throughout.

Why damp and dirt demand a careful cleanup

Rain and coastal salt are especially corrosive because salt remains after water evaporates and can hold damp against metal. Springs, screws, extractor components and exposed steel can develop rust if a wet pistol is simply put away. Salt deposits also become abrasive as parts move during firing.

Mud and grit are mechanical problems as well as chemical ones. A particle trapped under the extractor or slide can cause scraping, binding or intermittent malfunction. Organic debris can retain water against the frame, while insect residue may gum up small controls and accessories.

A light film of oil protects bare metal, but oil applied over trapped moisture can keep that moisture in contact with the surface. Dry the components, remove the dirt, then apply only the lubricant recommended in the manual. This sequence matters more than using a stronger cleaner or more product.

Set up a safe Australian cleaning space

Choose a stable, well-lit and ventilated bench away from children, pets, food and carpet. Lay out a washable gun mat or clean sheet so small springs and screws cannot disappear. A phone photograph before disassembly can confirm each part’s orientation during reassembly.

Keep ammunition separate and never clean a loaded pistol. Remove the magazine, visually check the chamber and action, and follow the manufacturer’s unload and takedown instructions. A ute tray, boot rack or motel-room drawer may be encountered on a shooting trip, but it is not a suitable bench for loose parts or chemical cleaners.

Wear eye protection and gloves specified by the cleaner’s label, and use a non-abrasive brush rather than steel wool. Gun mats, bore snakes, compatible lubricants, swabs and cleaning kits can be sourced from online specialist retailers such as Wesson Arms and from Australian gun shops. Follow each product’s directions and the venue’s rules.

Break down the M&P correctly

With the unloaded pistol pointed in a safe direction, secure the slide as directed in the owner’s manual and complete the takedown for that model. M&P Shield, M&P 2.0 and full-size configurations do not always present identically, so never force a step that does not fit the pistol in hand.

Separate the upper from the lower using the prescribed sequence, supporting the slide rather than twisting the frame. Place parts on the mat in a logical order and inspect for grit, rust, dents or a damaged firing-pin aperture. Stop if anything appears out of place, and never put fingers into the chamber.

The field-strip level suits routine care but may not expose every internal surface. Do not pry off trigger components or remove safety parts unless the manual covers that task. An authorised gunsmith can perform a deeper clean if contamination remains inside the action.

Clean the barrel, frame and slide

Let the barrel cool, then use patches and a clean bore snake with an appropriate gun cleaner, following the product and manufacturer directions. Pass the snake from the chamber end towards the muzzle so debris moves out rather than back towards the breech. If lead ammunition is used, keep a dedicated lead-contaminated snake separate from one used with jacketed bullets.

Wipe the frame with a microfiber cloth lightly dampened with mild soap and water where the manufacturer permits, then dry it immediately. Avoid spraying cleaner directly onto the pistol, where liquid can enter the trigger area or action. Use a firearm-compatible cleaner on a swab around the extractor, rails and screw heads.

Brush the slide’s serrations, porting and underside, especially where the barrel meets the slide. Remove grit from the ejection port and controls without forcing either one. Do not use metal around the muzzle, barrel crown or sights, as a scratch can alter performance or spoil the finish.

Care for magazines, grips and sights

Empty each magazine separately and keep it away from the pistol. Remove grit from the follower, spring and inner walls with a soft brush, wipe the exterior and let every part dry fully. A light film on exposed metal can protect against damp air, but excessive oil inside the magazine only attracts dirt.

Remove grip panels as directed and clean polymer with mild soap and water, avoiding harsh solvents that can swell or stain it. Dry the panels and grip frame completely before refitting. Check the palm swell and beavertail for grit, because pressure points can make a secure fit feel sticky.

Sights, holsters, lasers and weapon lights need separate attention. Brush dirt from mounts and check each accessory. Clean optic glass with an approved lens product, not general solvent, and remove any light or laser before cleaning around the rail. Replace a leaking battery rather than trapping moisture inside.

Dry, lubricate and function check

Give the parts time to dry after washing. An air bulb or low-pressure air can clear loose debris; once everything is dry, silica gel can help a closed gun case manage humidity. Do not seal a damp pistol away or leave it on a vehicle dashboard, where heat can drive moisture into the metal.

Once dry, apply a very thin film of manual-approved lubricant to the slide rails, extractor, action surfaces and other specified contact points. Wipe off surplus, especially from the trigger. If the M&P is a discounted blemished unit, record existing finish marks and avoid abrasive polish, which can expose fresh bare metal.

Reassemble the pistol empty, using the correct spring orientation and retaining parts. Confirm that the slide, trigger reset and safety operate normally, and inspect the muzzle, chamber and feed path again. Do not chamber live ammunition as a function check. Persistent binding, pitting or an uncertain spring deserves professional attention before use.

A practical wet-weather cleanup checklist

A small range kit handles the first stage before wet gear reaches the vehicle. Keep the pistol cased and separate from wet clothing, and deal with surface contamination before packing it away.

Use this list at the range:

Use this checklist back at the bench:

The dependable routine is to remove grit and moisture first, lubricate only dry metal, and store the unloaded M&P in a locked, dry place with ammunition separately secured as required. That sequence after every wet outing protects the finish, reduces corrosion and supports reliable handling on the next Australian range day.