--- title: What is the Compact Action? description: What is the Compact Action? --- [Skip to content](https://support.cmmg.com/-what-is-the-compact-action#main-content) [Contact Us](https://support.cmmg.com/kb-tickets/new?hsLang=en) [![CMMG\_LOGO\_HORIZ\_BLACK](https://support.cmmg.com/hs-fs/hubfs/CMMG_LOGO_HORIZ_BLACK.png?width=160&height=47&name=CMMG_LOGO_HORIZ_BLACK.png)](https://support.cmmg.com/?hsLang=en) Open main navigation Close main navigation - [Contact Us](https://support.cmmg.com/kb-tickets/new) - [Go to CMMG.com](https://cmmg.com/) [Go to CMMG.com](https://cmmg.com/) Hey there! What can we help you find the answer to? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://support.cmmg.com/?hsLang=en) 2. [DISSENT](https://support.cmmg.com/dissent?hsLang=en) # What is the Compact Action? Our patent-pending Compact Action makes it possible to operate the firearm without an AR15 receiver extension (buffer tube) and buffer assembly installed. The Compact Action uses a set of dual guide rods and springs contained within the upper receiver to cycle the action and is compatible with both Direct Impingement and CMMG’s patented Radial Delayed Blowback™ operating systems. - [Common Product Questions](https://support.cmmg.com/common-product-questions?hsLang=en) - [FAQs](https://support.cmmg.com/faqs?hsLang=en) - [DEFCAN](https://support.cmmg.com/defcan?hsLang=en) - [DISSENT](https://support.cmmg.com/dissent?hsLang=en) - [BANSHEE](https://support.cmmg.com/banshee?hsLang=en) - [RESOLUTE](https://support.cmmg.com/resolute?hsLang=en) - [ENDEAVOR](https://support.cmmg.com/endeavor?hsLang=en) - [Lead Times](https://support.cmmg.com/lead-times?hsLang=en) - [Dealer/OEM](https://support.cmmg.com/dealer-oem?hsLang=en) [![Chill listening crop-3](https://support.cmmg.com/hs-fs/hubfs/Email/cmm-logo.png?width=85&height=24&name=cmm-logo.png "Chill listening crop-3")](https://support.cmmg.com?hsLang=en) support.cmmg.com Knowledge Base Copyright © 2026, CMMG Inc.