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Every AR-15 lives or dies by how well it cycles, and the buffer is a bigger part of that equation than most folks realize. The Luth-AR BS-11C is a standard .223/5.56 carbine buffer that houses three steel slugs for a total weight right around 3.2 ounces, which is the most common carbine buffer weight out there. That weight is what most factory rifles and buffer tube kits ship with, so if you're replacing a worn-out buffer or finishing a fresh build, this drops right into where the old one came out.
The three steel weights inside aren't just there for mass. They shift back and forth under recoil, which helps soak up bolt bounce and smooths out the impulse as the action cycles. At roughly 3.25 inches long, it fits standard carbine-length receiver extensions, both mil-spec and commercial diameter. This is the lightest of the common buffer options, so it tends to cycle easily and reliably across a wide range of ammo and gas system setups.
Standard carbine buffers like this one pair well with carbine and mid-length gas systems on typical 16-inch 5.56 rifles. If your rifle already runs clean and locks back every time, a standard buffer is exactly what you want. If you're running a short barrel, a suppressor, or an overgassed setup that ejects brass way forward and kicks harder than it should, that's usually the sign to step up to an H or H2. For most standard carbines, though, this is the baseline that just works.
Luth-AR builds their parts in America and has a solid reputation among people who assemble AR-15s for a living and for fun. It's a straightforward, no-nonsense component that does its job without any fuss, which is exactly what you want out of a buffer.
It's built for AR-15 platform carbines chambered in .223 Rem or 5.56 NATO. At about 3.25 inches long, it fits standard carbine-length receiver extensions in both mil-spec and commercial diameters. It pairs well with carbine and mid-length gas systems on typical 16-inch builds.
The BS-11C comes in right around 3.2 ounces, which is the standard carbine buffer weight. Inside the body are three steel slugs that move under recoil to help dampen bolt bounce and smooth out cycling. This is the lightest of the common buffer weights and the one most factory rifles and buffer kits use.
If your rifle cycles reliably, locks back on an empty mag, and ejects brass around the 3 to 4 o'clock position, a standard carbine buffer like this is the right call. If your gun feels sharp, runs overgassed, or throws brass way forward toward 1 to 2 o'clock, that's usually when folks move up to an H or H2 for a calmer impulse. Short barrels and suppressed setups often benefit from a heavier buffer as well.
Yes, it's a simple drop-in swap. With the buffer spring compressed, the old buffer comes out and the BS-11C goes right into the receiver extension in its place. No gunsmithing or special tools needed for a standard replacement.
| UPC | 859819007171 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BS-11C |
| Product Type | Buffer |
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