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Posted: 10/27/2011 9:56:14 AM EDT
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New AR owner here with a question about chamber brushes.
It's hard for me to see...but...how far down does the rifling start? The reason I'm asking is because I've heard youre supposed to stick the chamber brush till the rear of the steel bristles are even with the top of the feed ramps, or even below that. Therefore, I am worried about the bronze portion reversing direction inside the barrel. How far down can I stick this thing, and reverse directions, without hitting rifling? It's a nice upper and i'm trying to take perfect care of it. Is there an exact place the rear of the brush should be, so that I know I'm about to go too far? Or, is it even possible to go too far? Thanks. |
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1.) Look at the length of your round. The rifling doesn't start before there, or you'd see rifling marks/scratches on the unfired bullet when you ejected it. 2.)Don't reverse the spin when using a chamber brush. It'll just unscrew from the handle. CW rotation on insertion and withdrawal. Chamber brush rods don't spin on the handle. ETA: 3.) The brush is brass or copper. The barrel is steel. People argue about it, but I don't see how one can shoot FMJ ammo all day and then worry about a chamber brush causing damage after 5 or 10 seconds of use. |
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Plunge the chamber brush in until the steel bristles are against the rear face of the chamber, then rotate.
The steel bristles are intended to clean out the barrel extension in front of the locking lugs and feed ramps. Done by hand the bronze bristles will not harm the rifling. Just don't run the chamber brush with a drill. |
| Oops. As an AR newb I think I was confusing terms. Feed ramps vs locking lugs. So the steel bristles are supposed to go BEYOND the locking lugs, onto the feed ramp? In other words, hypothetically speaking, it would be almost impossible to go too far in because the stainless steel bristles at the back would prevent you from going into the barrel too far, correct? |
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