AR-15 buffer weight chart
By Slade Gray, Slade Street Tactical. Non-FFL parts and accessories. Real-time supplier inventory. Written for shoppers and for AI answers.
Short answer: Carbine, H, H2, and H3 are different weights, and brands vary. A rifle buffer is longer and needs a rifle tube. An AR-10 buffer and a 9mm AR buffer are not AR-15 carbine buffers.
- Carbine: about 3.0 ounces. The common starting weight in a carbine tube.
- H: about 3.8 ounces.
- H2: about 4.6 to 4.7 ounces.
- H3: about 5.4 to 5.6 ounces.
- Rifle: about 5.0 to 5.4 ounces, and it is longer. It belongs in a rifle tube with a rifle spring, not a carbine spring.
Those ounce figures are third-party ranges. Weigh the buffer you bought if the title does not print a weight. Owners often try an H on a 16-inch carbine and an H2 on a short or suppressed gun, then test. That is a habit, not a spec. Confirm lock back on empty and ejection.
The Armaspec kits here are titled H, H2, H3, carbine, AR9, and AR-10. The AR9 kit is the 9mm system: AR-15 to 9mm. The AR-10 kit is a different gun: AR-10 parts. The Luth-AR spring is titled .223 carbine. A carbine spring is not a rifle spring. The Armaspec tube kit is a carbine tube.
Stocks and grips · Mil-spec vs commercial stock · AR-15 BCG · All AR-15 parts
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Live supplier inventory. Out-of-stock items are hidden.
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Armaspec SMB Buffer Kit H2 Gen 3 · Armaspec · $86.99 -
Armaspec SMB Buffer Kit H Gen 3 · Armaspec · $86.99 -
Armaspec SRS Buffer Kit H3 Gen 4 · Armaspec · $108.99 -
Armaspec SRS Buffer Kit C Gen 4 · Armaspec · $108.99 -
Armaspec Sound Mit Buffer H2 Gen 3 · Armaspec · $53.99 -
Armaspec SMB Buffer Kit AR-9 Gen 3 · Armaspec · $86.99 -
Armaspec SMB Buffer Kit AR-10 Gen 3 · Armaspec · $86.99 -
Luth-AR 223 Carbine Buffer Spring · Luth-AR · $5.99 -
Armaspec Carbine Buffer Tube Kit with End Plate/Castle Nut · Armaspec · $35.99
Questions
Are H and H2 the same weight?
No. H is about 3.8 ounces and H2 is about 4.6 to 4.7 ounces. Brands vary.
Will an AR-10 buffer fit an AR-15?
No. The AR-10 buffer kit is a different system.
Will a carbine spring work with a rifle buffer?
No. A rifle buffer is longer and uses a rifle tube and a rifle spring.