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The Geissele Super 42 Tungsten Buffer Weight is one of those small parts that punches way above its size. It's a single tungsten insert that drops into your existing Super 42 buffer to bump it up one weight class. Since the base Super 42 buffer already runs as an H1, adding one of these takes you to an H2, and a second one gets you to an H3. Tungsten is nearly two and a half times denser than steel, so you get real mass packed into a compact piece that fits right in place of a standard steel weight.
Tuning buffer weight is all about matching your rifle's gas system and barrel length so the action cycles cleanly without beating itself up. Geissele's own guidance points shorter-barreled builds toward heavier setups, with the H2 being the same weight the military issues in M4A1 rifles, and barrels under 14.5 inches usually benefiting from some testing between H2 and H3. Getting this right means smoother cycling, better felt recoil, and more reliable feeding and extraction. To make the swap, you'll disassemble the buffer and replace one steel weight with this tungsten piece, then reassemble.
Because tungsten is so dense and hard, it holds up to the constant hammering inside the buffer tube without deforming, and it keeps its mass consistent shot after shot. Shooters running short 5.56 pistols and SBRs with the Super 42 braided spring often report a noticeable drop in recoil after stepping up to H2 or H3, with reliability staying rock solid. It's a favorite move for anyone chasing that flat, soft-shooting feel on a shorter gun.
Worth knowing: this listing is for the weight only, not the complete buffer or the spring. While it's built to integrate with the Super 42 family, the weight is close to mil-spec dimensions and will also fit standard AR-15 carbine buffers that use mil-spec internal weights. If you're already running the Super 42 system, this is the easy add to fine-tune it exactly how you want.
No, this listing is for a single tungsten weight only. It's an insert that goes inside a buffer, not the complete buffer body or the Super 42 spring. You'll need an existing buffer to drop it into.
Each tungsten weight bumps your buffer up one class. Since the Super 42 buffer starts as an H1, adding one weight makes it an H2, and adding a second makes it an H3. To hit multiple configurations, plenty of folks buy two.
It's designed to integrate with the Super 42 buffer family, but it isn't proprietary. The weight is very close to mil-spec dimensions, so it also fits standard AR-15 carbine buffers that use mil-spec internal weights. Users have confirmed it drops into other common carbine buffers just fine.
Heavier buffers generally pair with shorter barrels and carbine gas systems. Geissele notes that many 14.5 inch rifles do well with an H2, which is what the military runs in M4A1s, while barrels under 14.5 inches usually need some testing between H2 and H3. It's best to test your specific build to confirm reliable cycling.
| UPC | 854014005915 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 04246 |
| Color | BUFFER WEIGHT |
| Length | 4.2500 |
| Product Type | Buffer Weight |
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