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Advanced Technology
Overview
The Advanced Technology AR-15 Military Mil-Spec Buffer Tube Assembly Package is a complete parts kit designed to deliver reliable performance in your build. Its Mil-Spec buffer tube ensures compatibility with most AR-15 stocks and components, while the hardcoat anodized finish on the 6061-T6 aluminum provides durability and resistance to wear. This assembly is commonly found in mid-length gas system builds chambered in 5.56 NATO, making it a practical choice for standard configurations.
Advanced Technology AR-15 Military Mil-Spec Buffer Tube Assembly Package
Prices checked
Advanced Technology AR-15 Military Mil-Spec Buffer Tube Assembly Package was the ninth most added buffer tube on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it is the sixth most added buffer tube on the site. Builds with this buffer tube are mostly chambered in 5.56 NATO (76%, then .223 Wylde 9%), split between mid-length (51%) and carbine-length (29%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 6 of the 7 retailers we track have it in stock. The best price crept up from $45.27 to $47.48 over October 2026. Buying today, the lowest price is $46.05 at BattleHawk Armory.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
We ranked every buffer tube by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Buffer Tube Guide →Check it against the live catalog:
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Advanced Technology Ar-15 Military Mil-Spec Buffer Tube Assembly Package
| Build | Parts | Total |
|---|---|---|
 | 21 | $1093.88 |
 | 14 | $770.37 |
 | 17 | $1445.42 |
 | 23 | $2435.04 |
| 29 | $4975.47 |
 | 14 | $965.68 |
 | 14 | $1473.45 |
 | 25 | $3353.58 |
 | 21 | $2267.19 |
1 global rating
Top reviews
ATI sells this as a complete buffer tube kit with castle nut, end plate, spring, and buffer. Quality is on par with any other entry level kit. Buffer tube is properly anodized 6061 aluminum. Six positions click positively. Good way to spec out a basic build without sourcing individually.
