CMMG AR15 Carbine Receiver Extension KIT
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CMMG
Overview
The CMMG AR-15 Carbine Receiver Extension Kit is a comprehensive parts kit designed for building or upgrading your AR-15. Featuring a Mil-Spec buffer tube, this assembly is specifically configured for carbine-length setups, ensuring compatibility with a wide range of stocks and enhancing overall functionality. This kit is commonly used in carbine builds, making it a reliable choice for those looking to streamline their assembly process.
Specifications
Build history on GunPartPicker
Builders on GunPartPicker first added the CMMG AR15 Carbine Receiver Extension KIT to a build in March 2026.
It was in stock most days in August 2026, and today 6 of the 8 retailers we track have it in stock. It dipped to $49.89 at BattleHawk Armory for a stretch in August 2026, under its usual $55.19 to $92.99, so sales do come around. Buying today, the lowest price is $55.19 at Classic Firearms, above August's low of $49.89, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
Not sure which buffer tube assembly to pick?
We ranked every buffer tube assembly by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Buffer Tube Assembly Guide →Check it against the live catalog:
Frequently Built With
Popular alongside buffer assembly parts on GunPartPicker
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Builds Featuring This Part
See all 1 →Builds in the community that include the Cmmg Ar15 Carbine Receiver Extension Kit
| Build | Parts | Total |
|---|---|---|
 | 24 | $1319.05 |
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