20-Pack 5.56mm Chamber Brush

In stock

SKU: BR-0001-556-p20

Product

20-Pack 5.56mm Chamber Brush

In stock

SKU: BR-0001-556-p20

$56.00

$49.28

Packs

Available Options

5.56

$2.80

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A bore brush cleans the barrel - but carbon builds up in the chamber too, and a standard bore brush is too narrow to reach it. This 5.56mm chamber brush is shaped specifically for the .223/5.56mm chamber, neck, and shoulder area where carbon fouling accumulates in AR-15 platform rifles. Phosphor bronze bristles scrub out hardened deposits that cause feeding and extraction issues.

If you shoot an AR-15, M4-pattern, or any .223/5.56mm rifle, chamber cleaning should be part of your routine. Carbon rings form where the case neck meets the chamber wall, and over time that buildup causes failures to extract, sticky bolts, and short-stroking. A regular bore cleaning handles the barrel - this AR-15 cleaning brush handles the rest.

Use after every range session: insert, rotate a few times, pull out. Follow with a solvent-soaked patch to wipe out loosened carbon. Quick gun cleaning step that prevents the most common AR-15 reliability issues. Pair with a .22 caliber bore brush for complete bore cleaning of your 5.56mm rifle.

Caliber:

.223 Rem, 5.56 NATO

Product Type:

Chamber Brush

Firearm Type:

Rifle

Use Case:

Bore Fouling Removal

Pack Size:

10-Pack, 20-Pack, 3-Pack, 5-Pack, Single

Bristle Material:

Phosphor Bronze

Core/Stem Material:

Twisted Wire (Brass)

Thread Size:

8-32

Country of Origin:

Imported (China)

Brand:

GUNNIX

What is the difference between a chamber brush and a bore brush?

A bore brush is sized to scrub the barrel - the long tube the bullet travels through. A chamber brush is wider and shorter, shaped to clean the chamber - the area where the cartridge sits before firing. AR-15 chambers have a complex geometry with a neck, shoulder, and locking lug recesses that collect carbon. A bore brush cannot reach these surfaces because it's too narrow.

Do I really need a chamber brush for my AR-15?

If you shoot regularly, yes. The AR-15 gas system blows carbon back into the chamber with every round. After several hundred rounds, carbon builds up in the locking lug recesses and chamber walls. This carbon causes failures to feed, failures to extract, and "sticky bolt" malfunctions. A chamber brush removes this buildup before it causes problems - it's preventive maintenance.

How do I use a 5.56mm chamber brush?

Remove the bolt carrier group. Insert the chamber brush from the receiver end and rotate it by hand or with a cleaning rod - 10 to 15 clockwise rotations with solvent is usually enough. The oversized bristle section scrubs the chamber walls while the smaller tail section cleans the neck area. Follow with a chamber mop or patches to remove loosened carbon. Check the locking lug recesses - they collect the most buildup.

Can I use a regular .22 caliber bore brush instead of a chamber brush?

No - it's too small. A .22 bore brush has a diameter of 0.224 inches, but the 5.56mm chamber is 0.378 inches at its widest point. A bore brush passes through without touching the chamber walls. You need a brush specifically shaped for the chamber's tapered geometry. Some shooters use a .243 or .25 cal brush for the chamber neck area, but it still won't reach the lug recesses.

How often should I clean the chamber on my AR-15?

Clean the chamber every time you clean the bore - they should be part of the same routine. If you shoot high round counts (200+ in a session), check the chamber more frequently. Carbon buildup in AR-15 chambers is cumulative and progressive. Catching it early takes 30 seconds with a chamber brush. Letting it build up means harder scrubbing, or worse, a malfunction when you need the rifle to work.

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