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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.
Prices checked
CMMG AR-15 Bolt Catch is the third most added bolt catch on GunPartPicker so far in October 2026, behind the Geissele Automatics AR-15 Maritime Bolt Catch Steel Black, with about 10% of all bolt catches added to builds. That's its 3rd straight month at #3. Builds with this bolt catch are mostly chambered in 5.56 NATO (81%), split between mid-length (59%) and carbine-length (25%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 5 of the 8 retailers we track have it in stock. It dipped to $8.69 at KY Gun Company for a stretch in September 2026, well under its usual $10, so sales do come around. Buying today, the lowest price is $8.69 at KY Gun Company, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 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 hundreds of builds that include this one
CMMG AR-15 HD Pivot and Takedown Pin Parts KIT - 55AFF3B
CMMG AR15 Magazine Catch - 55AFFA7
PSA AR-15 "Stealth" Stripped Lower Receiver
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 | $2732.46 |
 | 21 | $827.22 |
 | 19 | $1183.80 |
 | 14 | $1151.51 |
 | 33 | $2780.91 |
 | 20 | $804.15 |
 | 20 | $2541.24 |
 | 30 | $3725.95 |
 | 16 | $833.28 |
 | 23 | $1580.89 |
 | 27 | $953.87 |
 | 24 | $1241.41 |
1 global rating
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.
