Armaspec STLTH Recoil Spring Kit – AR-15 (H, H2 Buffer Compatible)

The Armaspec STLTH Recoil Spring Kit replaces your standard AR-15 buffer spring with a captive, multi-spring system designed to reduce spring noise and smooth out the recoil impulse. Unlike traditional buffer springs that can ping and vibrate, this kit uses a series of nested, captured springs that dampen sound while maintaining consistent cycling pressure. It's a popular upgrade for shooters who want a quieter, smoother-running carbine without changing how the rifle operates.

The kit is compatible with H and H2 buffers and installs as a drop-in replacement—no gunsmithing or permanent modifications required. The captive spring design also reduces wear on the buffer tube threads. Made from heat-treated steel with a durable coating, the STLTH system is built to withstand thousands of cycles. Installation takes minutes with basic tools.

• Part Type: Recoil Spring Kit
• Compatible Firearms: AR-15 carbine-length buffer tubes (H, H2 buffers)
• Material: Heat-treated steel springs
• Finish: Protective coating
• Installation: Drop-in
• Includes: Captive recoil spring assembly, installation hardware