Armaspec SRS H3 Buffer Kit Gen 4 – AR-15 Mil-Spec 6-Position
Armaspec
$108.89
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Armaspec
Armaspec SRS H3 Buffer Kit Gen 4 – AR-15 Mil-Spec 6-Position
The Armaspec SRS H3 Buffer Kit Gen 4 is a complete, drop-in buffer system upgrade for AR-15 rifles, delivering smoother cycling, reduced felt recoil, and everything you need for a full stock assembly installation in one package.
- SRS H3 multi-stage recoil buffer weighs 5.6 oz for reliable cycling control
- Mil-spec 7075-T6 aluminum 6-position buffer tube for strength and durability
- Includes steel castle nut and end plate — no additional hardware needed
- Gen 4 SRS design smooths recoil impulse across multiple stages of compression
- Compatible with all AR-15 pattern mil-spec lower receivers
- Complete kit simplifies installation and ensures perfectly matched components
Who This Is For
This kit is ideal for AR-15 builders, upgraders, and competitive shooters who want a complete, matched buffer system without sourcing individual components. Whether you're assembling a new lower or refreshing a worn buffer setup, the Armaspec SRS H3 Gen 4 kit delivers a noticeable improvement in recoil management and bolt carrier cycling — making it a smart choice for both range enthusiasts and those building a duty-ready rifle.
Specifications
| Brand | Armaspec |
|---|---|
| Model | SRS H3 Buffer Kit Gen 4 |
| Buffer Weight | 5.6 oz (H3) |
| Buffer Type | Multi-Stage Recoil (SRS) |
| Buffer Tube | Mil-Spec 6-Position, 7075-T6 Aluminum |
| Included Components | SRS H3 Buffer, Buffer Tube, End Plate, Castle Nut |
| Compatibility | AR-15 Mil-Spec Pattern Lower Receivers |
| Generation | Gen 4 |
| Castle Nut / End Plate Material | Steel |
Frequently Asked Questions
What makes the SRS H3 buffer different from a standard carbine buffer?
The Armaspec SRS (Stealth Recoil Spring) H3 buffer uses a multi-stage internal recoil system that cushions the bolt carrier group through multiple compression phases rather than one single impact. This results in a smoother, more controlled felt recoil compared to a standard mil-spec carbine buffer, and can reduce wear on your lower receiver over time. The H3 designation indicates a heavier 5.6 oz weight, which is especially beneficial for rifles running mid-length gas systems or adjustable gas blocks.
Will this kit fit my AR-15 lower receiver?
Yes — this kit is designed to fit any AR-15 pattern lower receiver that accepts a standard mil-spec buffer tube. It will not fit AR-10 / .308 pattern lowers, pistol-length buffer tube setups, or proprietary receiver designs that require a commercial-spec (wider diameter) buffer tube. If your lower is a standard mil-spec AR-15, this kit will install using common armorer's tools without any modification.
Do I need any additional parts to complete my lower build with this kit?
This kit includes the four core components needed to mount a collapsible stock to your lower receiver: the SRS H3 buffer, the 6-position mil-spec buffer tube, the end plate, and the castle nut. You will still need a lower parts kit (LPK) for the fire control group and grip, a compatible mil-spec collapsible stock, and a recoil spring. Some builders prefer to pair this buffer with Armaspec's dedicated SRS recoil spring for optimal performance, though a standard carbine recoil spring will also function correctly.
