Spike's Tactical St-9x 9mm Heavy Buffer
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Spike's Tactical
Overview
The Spike's Tactical ST-9x 9mm Heavy Buffer is a robust component designed specifically for use in AR-15 builds that utilize a Mil-Spec Carbine buffer tube. Constructed from stainless steel, this buffer is engineered to enhance the cycling of 9mm rounds, providing stability and reliability during operation. While it is tailored for 9mm configurations, you'll commonly find this buffer in builds featuring a mid-length gas system, particularly those chambered in 5.56 NATO.
Specifications
August 2026 on GunPartPicker
Spike's Tactical St-9x 9mm Heavy Buffer ranked #13 of the 88 buffers builders added on GunPartPicker in August 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #34 of the 171 buffers builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 7 of the 8 retailers we track have it in stock. Prices barely moved in August 2026, holding around $44.96, so there haven't been real sales lately. Buying today, the lowest price is $41.97 at GritR Sports, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
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