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CMMG
Overview
The CMMG AR-15 Bolt Catch is a standard black bolt catch designed to engage and hold the bolt in the rearward position, allowing for easier magazine changes and inspection of the chamber. This component is essential for any AR-15 build, ensuring reliable operation and functionality during shooting sessions. It is commonly found in builds featuring a carbine gas system and chambered in 5.56 NATO, making it a practical choice for a wide range of applications.
CMMG AR-15 Bolt Catch was the third most added bolt catch on GunPartPicker in August 2026, behind the Geissele Automatics AR-15 Maritime Bolt Catch Steel Black, with about 9% of all bolt catches added to builds. Up from #4 in July. Builds with this bolt catch are mostly chambered in 5.56 NATO (88%), mostly on mid-length gas (60%, then carbine-length 27%), and mostly AR-15 (85%, then AR-10 11%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 7 of the 9 retailers we track have it in stock. The best price drifted down from $9.99 to $8.69 over August 2026 without a real sale. Buying today, the lowest price is $8.75 at KY Gun Company, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
We ranked every bolt catch by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Bolt Catch Guide →The part most often added in each category by the 277 builds that include this one
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CMMG AR15 Magazine Catch - 55AFFA7
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CMMG AR-15 Safety Selector
Magpul MOE Grip Polymer Black
Geissele Automatics G2S Two Stage AR-15 Trigger .154"
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Cmmg Ar-15 Bolt Catch
| Build | Parts | Total |
|---|---|---|
 | 23 | $2723.43 |
 | 21 | $692.25 |
 | 19 | $1144.07 |
 | 14 | $1158.39 |
 | 33 | $2809.37 |
 | 20 | $802.40 |
 | 20 | $2464.48 |
 | 30 | $3616.59 |
 | 16 | $786.48 |
 | 23 | $1572.93 |
 | 27 | $901.33 |
 | 24 | $1168.21 |
3 global ratings
Top reviews
CMMG bolt catch works correctly but at this price you can get fancy options from Aero or Strike. Phosphate steel construction. Drops in with the standard catch spring. The CMMG name premium is real - the part itself is basic milspec.
CMMG bolt catch fits and finishes correctly in a milspec lower. Phosphate steel construction. Detent positions positively for both fire and retracted. Standard mil spec dimensions. Cheap basic part that does the job.
CMMG bolt catch is the standard mil spec part at the budget tier. Phosphate steel construction. Drop in fitment with the standard catch spring. Detents into both fire and retracted positions positively. Functional and cheap.
