Daily Archives for January 11, 2023

Bolt Carrier Groups: What You Need To Know

A bolt carrier group, or BCG, is a crucial component of an AR-15 rifle. It is responsible for housing the bolt and carrier assembly, which are the parts of the rifle that cycle the ammunition. The BCG is what allows your AR-15 to fire automatically.

The most important part of the quality bolt carrier group is the bolt carrier assembly. This is the part that contains the bolt and carrier, which are responsible for chambering and firing rounds. There are two main types of bolt carrier groups—mil-spec and commercial. Mil-spec bolt carrier groups are designed to meet the standards set by the U.S. Military, while commercial bolt carrier groups are designed for the civilian market.

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Mil-spec bolt carrier groups are made from 8620 steel, which is a high-carbon steel that is highly resistant to wear and tear. The bolts are made from Carpenter 158 steel, which is a high-strength steel that is resistant to fracturing. The carriers are heat treated and finished with a black phosphate coating, which protects against corrosion and makes it easier to clean.

Commercial bolt carrier groups are typically made from 9310 steel, which is a high-strength alloy steel that is also highly resistant to wear and tear. The bolts are usually made from A2 tool steel, which is a high-carbon steel that is known for its hardness and strength.

Types Of Commercial Cleaning Services

A commercial cleaning service is a professional cleaning service that specializes in cleaning businesses and other commercial establishments. These services are usually hired on a contractual basis, and they typically provide their own equipment and supplies. Many business cleaning services also offer green cleaning options, which use environmentally-friendly products and methods.

There are many types of commercial cleaning services available to businesses. The type of service you choose will depend on the size and needs of your business. 

Here are some of the most common types of commercial cleaning services:

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1. Office Cleaning – This type of service is designed to keep office space clean and tidy. Services may include dusting, vacuuming, mopping, and sanitizing surfaces.

2. Janitorial Services – Janitorial services are typically more comprehensive than office cleaning services. They may include trash removal, floor care, restroom cleaning, and window washing.

3. Carpet Cleaning – Carpet cleaning is an important part of keeping a business clean. Services may include vacuuming, stain removal, and deep cleaning.

4. Pressure Washing – Pressure washing can be used to clean the exterior of a business, including sidewalks, parking lots, and entryways.

5. Floor Care – Floor care services can help maintain the appearance of hard surface floors such as tile, linoleum, and hardwood. Services may include sweeping, mopping, and polishing.