Spike’s Tactical ST-9X 9mm Heavy Buffer

The Spike’s Tactical ST-9X (brand part no. SLA009X) is a stainless steel heavy buffer built specifically for a 9mm AR-15 carbine running in a standard carbine stock. Spike’s Tactical extended the buffer’s length as a dedicated 9mm design, and that extra length is what helps eliminate a common problem in blowback 9mm builds: broken bolt catches from a bolt carrier that cycles too far or too fast. Beyond protecting the bolt catch, the added mass smooths the gun’s cycling, improves overall reliability, and cuts down on the amount of gas blown back in the shooter’s face, which matters even more when running the gun suppressed.

Key Specifications

• Machined from stainless steel for a heavy, durable buffer.
• Built with an extended length as a dedicated 9mm design, unlike a general-purpose carbine buffer.
• Helps eliminate broken bolt catches, a common issue in 9mm AR builds using a standard-length buffer.
• Reduces gas blowback to the shooter’s face, especially noticeable when shooting suppressed.

Frequently Asked Questions

What caliber is this buffer built for? 9mm AR-15 carbines specifically.

What problem does the extended length solve? It helps eliminate broken bolt catches common in 9mm blowback builds.

Does it help when shooting suppressed? Yes, it reduces the amount of gas blown back in the shooter’s face.

Buy the Spike’s Tactical ST-9X 9mm Heavy Buffer

Order the Spike’s Tactical ST-9X buffer from Spike’s Tactical through our rifle stocks lineup. It ships fast from our Lubbock, Texas gun shop, fully insured.