The Spike's Tactical ST-T2 Heavy Buffer is a precision-engineered recoil management component built for AR-platform carbines that demand smooth, controllable cycling. If you're running an M4-type adjustable stock and looking to fine-tune your rifle's performance—whether for rapid-fire accuracy, full-auto control, or just day-to-day reliability—the ST-T2 bridges the gap between standard buffer weight and maximum recoil reduction. At 4.1 ounces, it combines machined aluminum construction with high-density tungsten powder fill to slow your bolt carrier group's movement, keeping you on target when it counts.

The tungsten-filled design replaces the noise and shock of traditional factory buffers with predictable, dampened action. This heavier buffer reduces cycle rate compared to standard offerings, which translates to better controllability in sustained semi-auto fire and improved reliability in full-auto configurations. The hard-anodized aluminum body resists wear and corrosion, while the mil-spec polyurethane bumper absorbs impact at the stock, protecting your receiver extension from damage and extending overall component life.

Spike's Tactical offers three buffer weights across their lineup—the ST-T2 is the middle option, making it a versatile choice for shooters who want meaningful recoil control without committing to maximum weight. It's popular with competition shooters, military-pattern rifle enthusiasts, and hunters who value a softer shooting platform without sacrificing reliability or simplicity. The signature Spike's logo is machined into the body.

Key Features

• High-density tungsten powder fill (4.1 oz.) for significant recoil reduction
• Hard-anodized aluminum construction resists corrosion and wear
• Mil-spec polyurethane bumper protects receiver extension
• Designed for M4-type adjustable stocks on AR-platform rifles
• Reduces cycle rate for improved controllability in rapid or full-auto fire
• Quieter operation and smoother cycling vs. standard factory buffers

Specifications

Model	ST-T2
Brand	Spike's Tactical
Weight	4.1 oz.
Fill Material	High-density tungsten powder
Body Material	Machined aluminum
Finish	Hard-anodized black
Bumper	Mil-spec polyurethane
Compatibility	AR-platform rifles with M4-type adjustable stock

Frequently Asked Questions

Will the ST-T2 buffer fit my AR-15 with an M4 stock?

Yes. The ST-T2 is designed for AR-platform carbines with M4-type adjustable stocks. It installs in the receiver extension like a standard buffer.

What's the difference between the ST-T1, ST-T2, and ST-T3?

All three are machined aluminum buffers with tungsten fill, but they differ in weight and recoil reduction. The ST-T1 (3 oz.) is standard weight with low-density tungsten. The ST-T2 (4.1 oz.) uses high-density tungsten for moderate-to-heavy recoil control. The ST-T3 (5.4 oz.) features ultra-dense tungsten bar stock for maximum recoil reduction, ideal for full-auto and suppressed rifles.

Does the ST-T2 reduce noise and shock compared to factory buffers?

Yes. The tungsten powder fill dampens the hard impact created by traditional factory buffers, resulting in smoother cycling and less shock transmitted to the shooter.

What's included with the buffer?

The ST-T2 is the buffer itself—the machined aluminum body with tungsten powder fill and mil-spec polyurethane bumper. Installation requires a standard AR receiver extension (tube), which is not included.