Mercury Precision "After Burner" AR-15 PVD Burnt Bronze Coated Bolt Carrier Group - 5.56/.223/.300/.350
An AR-15 bolt carrier group is a piece of a firearm that houses many key parts such as the firing pin, gas key, cam pin, extractor, and bolt. With all these pieces working together the BCG can grab and feed another round out of the detachable magazine chamber. During the extraction of a cartridge, the BCG works to absorb the force of the explosion by expanding gas in the carrier. Throughout this process, gas is tapped off from the barrel and sent into the cup inside of the gas key which creates an inertial force that sends the Bolt Carrier Group back into the buffer tube. This entire process helps to reduce recoil.
About this BCG: The Mercury Precision “After Burner” AR-15 BCG is a great way to add style to your build with its eye-catching burnt bronze color. Its PVD finish helps to increase scratch resistance and durability. The finish is easy to clean and helps reduce friction which makes the overall function smoother. This BCG is for 5.56/.223/350 Legend/300 Blackout and the bolt head has been MPI tested to ensure you are getting a high-quality product.
Caliber Compatibility: .223 Rem, 5.56 NATO, .300 BLK, .350 Legend - This BCG is standard for the .223 Rem, 5.56 NATO, .300 Blackout, .350 LGND calibers, and is interchangeable between all 4 simultaneously. This includes .22 Nosler Chambered AR-15s and .223 Wylde rifles.
Finish: Nitride/PVD Burnt Bronze - Nitriding is a process during manufacturing that diffuses nitrogen into the steel to make a case-hardened surface for improved resistance and strength.
A PVD Burnt Bronze BCG typically has a gloss bronze texture. Nitrided Bolt Carriers have increased resistance from heat, and corrosion.
Material: 9310 Alloy Steel - Bolt Head - 9310 Steel is a low alloy steel that is a mixture of nickel, chromium, and molybdenum. This steel is built to have high core hardness and high fatigue strength which make it the perfect steel to hold up in the harsh environments of the bolt head.
8620 Alloy Steel - Body - 8620 Steel is a carburized alloy steel meaning carbon was added to increase the hardness of the steel. 8620 is known for its high case toughness and high core toughness. Made mostly of nickel concentrate, this steel can easily withstand the firing stress of the BCG under operation.
Forward Assist Notches: This BCG comes with forward assist notches that allow the forward assist on the upper to contact the BCG, pushing it forward and locking the bolt into place. These forward assist notches can also help clear malfunctions in a speedy manner when the BCG becomes jammed.
Gas System: Direct Impingement - Direct impingement is the process of directing the gas created during the operation of a firearm through the barrel, gas block, gas tube, and eventually into the BCG again to cycle the action and prepare the firearm for another round.
SPECIFICATIONS:
Brand: Mercury Precision
Platform: AR-15
Caliber Compatibility: 5.56 NATO, .223 Rem, .300 BLK, .350 Legend
Bolt Head Material: 9310 Alloy Steel
Bolt Head Finish: Nitride
Body Material: 8620 Alloy Steel
Body Finish: PVD Burnt Bronze
Style: Standard
Gas System: Direct Impingement
Forward Assist Cuts: Yes
Full Auto Compatible: Yes
