Aero Precision AR-15 Mil-Spec Carbine Receiver Extension
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Aero Precision
Overview
The Aero Precision AR-15 Mil-Spec Carbine Receiver Extension is a tube-only assembly designed to meet military specifications, ensuring compatibility with a wide range of carbine stocks. This Mil-Spec buffer tube is essential for proper cycling in your AR-15 build, as it accommodates a carbine-length gas system, which is often preferred for its balance of recoil management and reliability. Builders frequently use this receiver extension in Mid-Length gas system configurations chambered in 5.56 NATO.
Specifications
Available Merchants(1)
Prices checked
Stock Alert
September 2026 on GunPartPicker
Aero Precision AR-15 Mil-Spec Carbine Receiver Extension ranked #38 of the 49 buffer tubes builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since February 2026. All time, it ranks #29 of the 63 buffer tubes builders have added. Builds with this buffer tube are split between 5.56 NATO (56%) and .223 Wylde (19%), split between carbine-length (50%) and mid-length (20%) gas systems, and mostly AR-15 (90%).
It was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $39.99 at Primary Arms for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 2 →Builds in the community that include the Aero Precision Ar-15 Mil-Spec Carbine Receiver Extension
| Build | Parts | Total |
|---|---|---|
 | 19 | $1517.90 |
 | 16 | $1942.17 |
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