Armaspec Stealth Recoil Spring Kit G4 - ARM253-H2 (also known as the Armaspec SRS™ GEN4 H2 Stealth Recoil Spring for AR-15).
This is a self-contained, multi-stage captured recoil system designed as a direct drop-in replacement for the standard AR-15 carbine buffer and spring. The GEN4 version features design improvements for increased durability and reliability, including a stainless steel weight, roll pin retention instead of screws/snap rings in prior generations, and elimination of the O-ring on the weight. It reduces felt recoil, quiets operation by preventing spring rub against the buffer tube, and keeps constant tension on the bolt carrier group (BCG) for smoother cycling.
Key Features & Specs
- Design: Captured multi-stage recoil spring system with dual-spring setup. The buffer mass stays under constant tension against the BCG. Includes a polymer bumper (1¼" for H2) at the rear to absorb impact and further dampen noise/recoil.
- Weight Configuration (H2): Equivalent buffer weight of 4.7 oz (standard H2 comparable). Actual complete system weight: ~7.4 oz (with stainless steel weight in GEN4).
- Length: 7.18" — fits standard carbine-length buffer tubes.
- Benefits:
- Significantly reduces felt recoil (second stage helps slow and soften the rearward motion).
- Quieter operation (eliminates the common "sprong" sound and metal-on-metal contact).
- Smoother, more consistent cycling.
- Drop-in installation (can run with or without the buffer retainer for easier maintenance; most users remove it).
- GEN4 Improvements: No O-ring on the weight; upgraded retention (roll pin for polymer end piece, machined cap on rod with washer instead of snap ring). These changes reduce potential failure points.
- Compatibility: AR-15 platforms with carbine buffer tube. Works with most BCGs (rear opening >0.60"; a few tight BCGs may not fit). Excellent for 5.56, .223, suppressed/unsuppressed builds, SBRs, and various gas systems. Users often tune by swapping weights (C: 3.3 oz eq., H: 3.8 oz eq., H2: 4.7 oz eq.).
- Materials: Stainless steel weight, high-quality springs, polymer bumper, and durable components. Made in the USA.
- Additional: Individual H2 unit (not the full C/H/H2 kit). Weights/bumpers are swappable within GEN4 (not backward compatible with older gens).
The H2 weight is a popular choice for mid-length or suppressed setups, or rifles that normally run heavier buffers. It provides more mass for recoil management and reliability in over-gassed or shorter-barrel builds while the multi-stage spring softens the action. Real-world feedback highlights noticeably quieter and softer shooting, especially with electronic ear pro, plus reliable function across a wide range of uppers. Some users note the stiffer spring may require dropping one weight level compared to a standard buffer setup for optimal cycling/bolt lock-back.
Who It's For
- AR-15 builders or owners wanting reduced recoil, quieter operation, and a smoother shooting experience without switching to a full hydraulic buffer.
- Suppressed shooters, competition shooters, or anyone sensitive to felt recoil and action noise.
- Users who prefer a captured system for easier maintenance and no loose spring/buffer worries.
