SAFETY & OPERATING YOUR FIREARM
Please read and understand all support materials provided before attempting to handle or use your firearm. Please take a firearms safety course to ensure firearm safety and knowledge. Local, state and federal law enforcement and fish and game departments provide excellent courses on firearm safety.
AMMUNITION
NEMO firearms are optimized to use quality ammunition. Your firearm will react differently based on a variety of factors including projectile weight, projectile velocity, powder type, and suppressor use.
The Mongoose should operate with most 124 grain and heavier 9mm ammunition.
DO NOT use +P+, low power, low recoil, or “light” ammunition as these modified rounds will cause reliability issues.
WARNING – Do not use ammunition that exceeds maximum chamber pressure recommended by SAAMI (Sporting Arms and Ammunition Manufacturers’ Institute). You must check your chamber dimensions before loading ammunition beyond SAAMI length. There are many different manufacturers of ammunition, types of ammunition, bullet weights and powder combinations will cause varying degrees of accuracy and performance of the firearm.
Immediately discontinue use of ammunition that shows excessive pressure signs such as flattened primers, blown primers, pierced primers or excessive marks.
SUPPRESSOR USE
Installing a suppressor on a semi-automatic firearm changes the cycling dynamics. In general, a suppressor increases wear and tear on the firearm. Using a suppressor increases the amount of carbon fouling entering the action and increases required cleaning and lubrication.
For use with the NEMO Mongoose 9mm PCC, we recommend selecting a suppressor that is short in length and is lightweight. It’s also necessary for the suppressor to have a built in Nielsen device/booster.
PERSONAL PROTECTION EQUIPMENT
Always wear eye and ear protection when using any firearm. Wearing ear protection that advertises attenuating the sound by at least 30 decibels is recommended. Repeated exposure to the loud noise that firearms produce may cause permanent hearing loss.
Quality shooting glasses protect you from spent shell casings, burned and unburned powder and gases.
Installing a suppressor on a semi-automatic firearm changes the cycling dynamics. In general, a suppressor increases wear and tear on the firearm. Using a suppressor increases the amount of carbon fouling entering the action and increases required cleaning and lubrication.
MAINTENANCE
Your firearm has been lubricated with CLP (cleaner/lubricant/preservative) from the factory. It is important that you clean and lubricate your firearm before firing for the first time.
A clean firearm will function much better than a dirty firearm. Having a clean, lubricated firearm will alleviate a lot of potential functioning problems. Applying excessive lubrication traps dirt and debris at a faster rate. If you are using your firearm in sub- freezing weather, use a CLP that is rated for winter/arctic use.
Dents on the brass after firing is due to the ejection process and is normal.
NEMO Arms offers the highest quality surface finishes. No matter how durable the finish, some staining and wear will occur on the bolt, barrel, anodized and painted surfaces and on polymers. Metal to metal contact will cause wear, some surfaces faster than others. Other damage may occur during normal use.
NEMO Arms fit and function checks and inspects each firearm. NEMO cannot guarantee fit or function with any other manufacturer’s components.
In general, your Mongoose does not need a formal barrel break-in, but you may notice a higher number of malfunctions during the first 100-200 rounds.
Never use abrasives or metal/wire brushes or harsh chemicals on aluminum components and finishes. Use a soft cloth, or soft nylon brush to clean aluminum components and aluminum finishes.
Never use solvents, metal/wire brushes or harsh chemicals on plastic/polymers. They will scratch or soften the material.
We recommend a cleaning schedule as follows:
• Clean and lube the bolt and barrel every 300 rounds
• Do a full take down, cleaning all parts and lubricating every 1000 rounds
OPERATION UNDER UNUSUAL CONDITIONS
NOTE - Unusual conditions are defined as any climate condition requiring special maintenance of the weapon.
Operating your firearm under these conditions can increase the likelihood of malfunctions and/or cause excess wear on components, compared to normal operating conditions. Resulting in a potential need to maintain and clean your firearm more frequently.
It is recommended that precautions are taken with less than desirable conditions to negate potential malfunctions and/or excess wear.
For climates with hot, arid or dusty conditions; lightly apply lubrication to internals, so not to cause a buildup of lubrication and dirt. Do not lubricate external parts of the firearm. Doing so will only collect dirt particles, making the firearm more difficult to keep clean. Do not lubricate internal components of the magazines.
Using additional equipment - i.e., protective caps and spare magazine protective bags and overall firearm protective cover will help minimize dust and sand from getting into the firearm. Use these items as the situation warrants.
For climates with damp, humid, or moist conditions; always keep the firearm dry. Using a protective cap will help keep water out of the barrel. Always drain/remove any water, snow or ice from the barrel before firing. Dry the bore with a patch and cleaning rod. Moisture will cause steel or iron parts to rust, corrode and/or seize. Proper lubrication and inspection are necessary for all parts in damp, wet, snowy, icy or moist conditions to prevent corrosion. Dry firearm/components off with cloth and re-lubricate with CLP, as needed.