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CMMG
Overview
The CMMG AR15 Magazine Catch is a reliable component designed to facilitate the smooth release of your magazine during reloads. This part ensures that magazines lock securely in place while providing a quick and effortless release when needed. It’s commonly found in builds featuring a rifle gas system and chambered for 5.56 NATO, making it an essential piece for standard AR-15 configurations.
CMMG AR15 Magazine Catch - 55AFFA7 was the fifth most added magazine release on GunPartPicker in August 2026, behind the TPS Arms AR-15 Mag Catch Assembly, Black - AR-1031, with about 4% of all magazine releases added to builds. Up from #11 in July. Builds with this magazine release are mostly chambered in 5.56 NATO (81%, then .223 Wylde 12%), mostly on mid-length gas (78%, then carbine-length 13%), and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 3 of the 6 retailers we track have it in stock. The best price drifted down from $10.99 to $9.45 over August 2026 without a real sale. Buying today, the lowest price is $11.99 at Palmetto State Armory, above August's low of $9.45, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every magazine release by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Magazine Release Guide →The part most often added in each category by the 132 builds that include this one
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the CMMG AR15 Magazine Catch - 55AFFA7
| Build | Parts | Total |
|---|---|---|
 | 22 | $893.64 |
 | 13 | $1011.56 |
 | 27 | $2969.88 |
 | 27 | $3308.75 |
 | 14 | $1124.82 |
 | 20 | $1789.30 |
 | 23 | $7658.58 |
| 16 | $1661.22 |
 | 16 | $923.14 |
 | 14 | $714.88 |
1 global rating
Top reviews
standard mil spec mag catch, drops in for a stock replacement with no fitting required. CMMG quality is consistent across their parts. cheap upgrade if you damaged your factory mag catch
