CMMG ZEROED Ambi Mag Catch and Button KIT MK9 Radial Delayed Blowback
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CMMG
Overview
The CMMG ZEROED Ambi Mag Catch and Button Kit Mk9 is designed to enhance magazine release functionality for both right- and left-handed shooters, thanks to its ambidextrous design. The standard button style allows for a familiar tactile feel when releasing magazines, ensuring smooth operation in high-pressure situations. This kit is commonly found in builds focusing on versatility and user adaptability, making it a popular choice for those looking to optimize their AR-15 for different shooting scenarios.
Specifications
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Stock Alert
October 2026 on GunPartPicker
CMMG ZEROED Ambi Mag Catch and Button KIT MK9 Radial Delayed Blowback ranked #61 of the 99 magazine releases builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #60 of the 199 magazine releases builders have added. Builds with this magazine release are mostly chambered in 5.56 NATO (73%, then 300 Blackout 18%), mostly on mid-length gas (83%, then carbine-length 17%), and nearly all AR-15.
Today the one retailer we track is out of stock. Listed prices start at $55.99 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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We ranked every magazine release by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Magazine Release Guide →Frequently Built With
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use 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 builds →Builds in the community that include the CMMG ZEROED Ambi Mag Catch and Button Kit Mk9 Radial Delayed Blowback
| Build | Parts | Total |
|---|---|---|
| Griffin Armament 11.5" Multi AR-15 Build | 26 | $3880.80 |
| Griffin Armament 11.5" Multi AR-15 Build | 21 | $4066.92 |
 | 22 | $1475.41 |
 | 18 | $4461.73 |
 | 19 | $1138.02 |
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