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The Armaspec SRS Buffer Kit H Gen 4 is a full buffer tube assembly that gives you everything needed to mount a stock to your AR-15 lower and upgrade the recoil system at the same time. Instead of running the old buffer-and-spring setup, this kit drops in the Stealth Recoil Spring in the H (heavy) weight, which comes in at roughly a 3.8 oz equivalent buffer. That extra mass helps smooth out the impulse without slowing down reliable cycling, and it works across a wide range of AR-15 uppers.
The Stealth Recoil Spring is a self-contained, multi-stage unit that replaces your standard buffer and spring in one piece. The guide rod runs down the center and keeps the spring from rubbing against the inner wall of the buffer tube, which is where a lot of that classic AR sproing noise comes from. The result is quieter, smoother operation, and the second stage of the spring is where you really feel the reduction in felt recoil. Folks who run these tend to notice less muzzle flip and easier follow-up shots. The Gen 4 version also refines the internals, swapping the older screw for a roll pin across the end piece and machining the cap onto the rod to cut down on potential failure points.
Everything in this kit is mil-spec sized, so it plays nice with standard AR-15 lowers and carbine stocks. The 7075-T6 aluminum receiver extension is the tougher forged alloy you want holding up under repeated cycling, and it ships with a steel castle nut and end plate to finish the job. Installation is straightforward: build out the tube, castle nut, and end plate like any carbine setup, then the SRS drops right into the tube in place of the factory buffer and spring. It can run with or without the buffer retainer depending on your preference.
The SRS-H is made in the USA and backed by Armaspec's lifetime warranty. One thing worth checking before you order: the SRS is not compatible with bolt carriers that have a rear opening of less than 0.60 inches, though the vast majority of carriers clear that spec without issue.
The Stealth Recoil Spring uses a self-contained, multi-stage design that keeps the spring off the inner wall of the tube and adds a second stage to soften the impulse. Shooters typically report noticeably reduced felt recoil, less muzzle flip, and quicker follow-up shots. The H weight simulates a 3.8 oz heavy buffer, which helps smooth out cycling on a wide range of builds.
Not at all. You assemble the buffer tube, castle nut, and end plate like any standard carbine setup, then the SRS drops right into the tube in place of your factory buffer and spring. It can be run with or without the buffer retainer, and no special tools beyond the usual castle nut wrench are needed.
Yes, it's built to mil-spec dimensions and fits standard AR-15 pattern lowers and carbine stocks. The one thing to verify is your bolt carrier, since the SRS won't work with carriers that have a rear opening smaller than 0.60 inches. Most carriers on the market clear that spec without any trouble.
The difference comes down to buffer weight and how much recoil tuning you want. The H is the 3.8 oz equivalent and works well as an all-around heavy buffer for most AR-15 builds. Stepping up to the H2 or H3 adds more mass for slowing down over-gassed or suppressed setups, so pick based on your rifle's gas system and how it runs.
| UPC | 810048492848 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARM263-H |
| Product Type | Buffer Tube Complete Assembly |
| Model | |
| Color | Black |
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