ARMASPEC AR-15 Buffer Tuning Kit Multi-Stage Drop-In Capture Spring Buffer System. Stealth™ Recoil Spring – GEN4 Includes inter-changeable Carbine, H1 and H2 Buffer weights to tune AR Buffer systems.

The AR15 KIT comes assembled as a C (Carbine 3.3 oz) and includes an H (H1 3.8 oz) and H2 (H2 4.8 oz) weight so you can tune your buffer system correctly.    

The AR15 Tuning Kit allows you to tune each AR15 to the proper buffer weight Stealth Recoil Spring™ SRS™ GEN4. This is a self-contained multi-stage drop-in replacement for your standard buffer and spring. The SRS™ is designed to keep the buffer spring from rubbing against the inner wall of the buffer tube providing smooth, quiet operation and the second stage helps reduce the felt recoil significantly. This is where the Tuning Kit allows a One-Stop buffer tuning at the range while setting up your rifle. Designed as a direct drop-in upgrade, the SRS™ delivers smoother cycling and quieter operation without complicated installation or tuning.

Traditional buffer systems allow the spring to rub against the inside of the buffer tube, creating friction and vibration. The Stealth™ Recoil Spring – SRS™ GEN4 system keeps the spring centered and guided. Reduce felt recoil, keep the buffer spring from rubbing against the inner wall of the buffer tube. Buffer mass is designed to stay under constant tension against the bolt carrier. Allowing them to move together as one for a linear smoother cycle.

If you’re looking to refine the performance, reduce recoil and feel of your AR platform, Stealth™ Recoil Spring – SRS™ GEN4 provides a simple, effective upgrade.

• Reduces Buffer Spring Noise – Internal guide rod design prevents spring contact with the buffer tube wall, eliminating unwanted friction and vibration.
• Smoother Recoil – The Tuning Kits multiple buffer weights allow for proper buffer weight selection for your rifle. Promotes consistent rearward and forward travel for improved operational feel and reduce recoil.
• Buffer Mass and BCG Unison/In sync – Buffer mass is designed to stay under constant tension against the bolt carrier. Allowing them to move together as one for a linear smoother cycle.
• Drop-In Installation – Direct replacement for standard carbine buffer and spring systems.
• Self-Contained Design – Integrated guide system maintains spring alignment inside the receiver extension.
• Improved Shooting Experience – Minimizes recoil impulse noise for a cleaner, more refined shot cycle.

• Model: GEN4-SRS-AR15 Tuning Kit, C, H and H2
• Weight: Approx weight based on which system you build
• Type: Multi-stage buffer system
• Compatibility: Standard AR-15 carbine buffer tubes
• Construction: Polymer base with integrated guide rod
• Installation: Drop-in replacement
• Patent: Pending
• SKU: ARM253-AR15KIT
• Condition: New

Insert the polymer base with guide rod into the buffer tube.

1. Install your desired spring onto the guide rod.
2. Insert the buffer over the spring.
3. No specialized tools required.

This component is designed for use with standard AR-15 pattern parts. Variations in aftermarket components, tolerances, or non-standard configurations may affect fit or function. If you have questions about compatibility with your specific setup, please contact us before ordering.