Armaspec Stealth Recoil Spring Gen 4 H3 Heavy Buffer System - ARM263-H3

*CONTACT US FOR A SPECIAL COUPON CODE*

Armaspec Stealth Recoil Spring Gen 4 (H3 Heavy Buffer - 5.6 oz) - ARM263-H3 - UPC 810048492862

Product Description

The Armaspec Stealth Recoil Spring (SRS) Gen 4 H3 Heavy Buffer System (ARM263-H3) is a high-performance, self-contained dual-stage drop-in recoil system designed to replace standard AR-15 buffer assemblies and springs. Built specifically for heavy-recoil, short-barreled rifle (SBR), pistol-caliber carbine (PCC), or over-gassed suppressed AR-15 configurations, this H3 variant (weighing equivalent to a 5.6 oz H3 buffer) drastically mitigates felt recoil and suppresses internal operational noise.

Engineered around Armaspec's patented two-stage spring architecture, the SRS Gen 4 system absorbs bolt carrier group impact energy progressively. The secondary spring engages at the end of the stroke to keep the bolt carrier from bottoming out harshly against the rear of the buffer tube. Furthermore, by keeping spring tension captive on a central stainless steel rod, it completely eliminates the annoying metallic "cheese grater" twang sound associated with traditional USGI wire springs scraping against buffer tube walls during cycling.

Precision-machined from stainless steel and high-grade aluminum, the ARM263-H3 drops directly into standard carbine-length buffer tubes without requiring specialized gunsmithing or permanent modifications to your receiver. Whether tuning a suppressed .300 Blackout, a short 5.56 NATO barrel, or a hard-hitting 9mm/PCC build, the Armaspec Gen 4 SRS H3 delivers smooth cycling, faster follow-up shot tracking, and quiet operational performance.

*Armorer Bench Notes & Real-World Staging Guidance:

Fitment Matrix: Direct drop-in fit for standard Mil-Spec and commercial carbine-length buffer tubes. Ideal for over-gassed 5.56 NATO, suppressed setups, .300 Blackout, and AR 9mm / PCC applications requiring an H3 (~5.6 oz) equivalent mass. Note: Do NOT use with rifle-length buffer tubes unless using a dedicated carbine-to-rifle spacer. You may optionally remove the lower receiver's buffer retainer pin and spring for easier field-stripping, though it is not strictly required.

1. Verify the firearm is completely clear, safe, and unloaded before opening the receiver.
2. Depress the existing buffer retainer pin, remove the factory buffer and wire spring from the carbine buffer tube.
3. Insert the Armaspec SRS Gen 4 assembly into the buffer tube with the rubber bumper facing rearward toward the stock endplate until seated flush.

Key Features

• Dual-Stage Recoil Mitigation: Progressive two-stage spring system absorbs bolt impact energy, reducing muzzle rise and felt recoil.
• Silent Operation: Captive central rod architecture prevents spring contact with buffer tube walls, eliminating spring twang noise.
• Heavy H3 Equivalent Mass (~5.6 oz): Calibrated for short barrels, suppressed platforms, high bolt-velocity setups, and heavy recoil calibers.
• Drop-In Installation: Installs directly into standard carbine buffer tubes with no receiver modifications needed.
• Stainless Steel & Aluminum Construction: Machined from high-strength stainless steel and hard-anodized aluminum for long-term cycling life.

Product Specifications

• Brand: Armaspec
• Model: Stealth Recoil Spring (SRS) Gen 4 - H3
• MPN / Part Number: ARM263-H3
• UPC: 810048492862
• Equivalent Buffer Weight: H3 (~5.6 oz / 158.7 g)
• Platform Compatibility: AR-15 / Carbine-Length Buffer Tubes
• System Type: Captive Dual-Stage Recoil Spring Assembly
• Body Material: Stainless Steel & Aircraft Aluminum
• Bumper Material: Polymer Rubber
• Mass: ~8.2 oz (232.5 g total system mass)