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The Bushmaster ACR is known for its versatility and modular design, making it a favorite among tactical and recreational shooters alike. However, to keep your rifle functioning reliably, regular cleaning and lubrication are essential. In this guide, we’ll cover the key steps to properly clean and lubricate your Bushmaster ACR, ensuring it remains in peak condition for years to come.
Why Regular Maintenance is Crucial
The Bushmaster ACR has a gas piston system and multiple moving parts that require regular cleaning to prevent debris buildup, which can cause malfunctions. Proper lubrication ensures the smooth operation of the bolt carrier group and prevents wear and tear on the moving components. Regular maintenance also prevents corrosion, particularly in environments with high humidity or after exposure to moisture.
Essential Cleaning Supplies
Before you begin cleaning your Bushmaster ACR, gather the following supplies:
- Cleaning rod with bore brush and patch holder
- Solvent or bore cleaner
- Gun oil for lubrication
- Soft cloths or microfiber towels
- Nylon brush or toothbrush for scrubbing components
- Q-tips for reaching tight areas
- Gun cleaning mat to protect your workspace
Step-by-Step Cleaning Process
1. Unload and Disassemble the Rifle
Before starting any cleaning procedure, ensure the rifle is unloaded by removing the magazine and visually inspecting the chamber. To disassemble the ACR, first remove the rear takedown pin to separate the upper and lower receivers. Then, remove the bolt carrier group and charging handle for easier access to internal components.
2. Clean the Barrel
Attach a bore brush to your cleaning rod, apply some solvent, and run it through the barrel from the chamber end toward the muzzle. This method follows the natural path of the bullet, helping preserve the rifling inside the barrel. After a few passes with the brush, switch to clean patches and run them through the barrel until they come out clean.
3. Clean the Bolt Carrier Group
The bolt carrier group (BCG) is particularly prone to carbon buildup, so use a solvent-soaked brush to scrub away residue. Pay extra attention to the bolt, firing pin, and extractor, as these parts are crucial for reliable cycling. Q-tips can help get into small areas, ensuring every component is thoroughly cleaned.
4. Clean the Gas Piston System
The ACR’s gas piston system also requires regular attention. After removing the gas regulator and piston, clean them with solvent and a brush. Make sure to dry all components thoroughly to avoid any moisture buildup, which could lead to rust.
Lubrication Tips for the Bushmaster ACR
1. Lubricate the Bolt Carrier Group
After cleaning, apply a thin layer of gun oil to the bolt carrier group components, including the bolt, cam pin, and firing pin. Be sure not to over-lubricate, as excess oil can attract dust and debris, potentially leading to malfunctions.
2. Lubricate the Gas Piston and Charging Handle
The gas piston and charging handle should receive a light coat of oil to ensure smooth operation, but don’t overdo it—too much lubrication in these areas can cause buildup. Apply just enough to keep these parts functioning smoothly without creating excess grime.
Reassembly and Final Check
Once all components are cleaned and lubricated, carefully reassemble the Bushmaster ACR, ensuring each part is properly aligned and secured. After reassembly, perform a function check to ensure the rifle cycles smoothly and all safety mechanisms are working correctly.
Conclusion
Proper cleaning and lubrication of your Bushmaster ACR are critical to maintaining its performance and reliability. By following this guide, you’ll keep your rifle in excellent working condition, ready for any challenge. Regular maintenance not only ensures the longevity of the firearm but also guarantees safe and consistent performance.
FAQ
How often should I clean my Bushmaster ACR?
You should clean your Bushmaster ACR after each use, especially after firing multiple rounds. If it hasn’t been used for a while, periodic cleaning is still recommended to prevent corrosion.
What type of lubricant should I use for my ACR?
Use a high-quality gun oil specifically designed for firearms. Avoid using heavy oils that may cause excessive buildup.
Can I over-lubricate my Bushmaster ACR?
Yes, over-lubrication can attract dirt and debris, potentially leading to malfunctions. Always apply a thin layer of lubricant to moving parts.
How do I clean the gas piston system?
Disassemble the gas piston system, clean the piston and regulator with solvent, and make sure all parts are dry before reassembly.
What should I do if my Bushmaster ACR shows signs of rust?
If you notice rust, use a rust remover specifically designed for firearms, then thoroughly clean and lubricate the affected areas to prevent further corrosion.