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CMMG
Overview
The CMMG Zeroed AR-15 Bolt Catch Kit is a standard steel bolt catch designed to securely hold the bolt in the rearward position after the last round is fired, allowing for quick and efficient reloading. This component is essential for reliable function in your AR-15 platform, ensuring that the shooter can easily identify when the magazine is empty. You’ll often find this bolt catch in builds featuring a mid-length gas system and chambered in 5.56 NATO, complementing the overall performance of the rifle.
CMMG Zeroed AR-15 Bolt Catch KIT ranked #14 of the 54 bolt catches builders added on GunPartPicker in August 2026, behind the Phase 5 Weapon Systems Extended, V3, Bolt Release, Flat Dark Earth, with about 2% of all bolt catches added to builds. Up from #25 in July. Builds with this bolt catch are mostly chambered in 5.56 NATO (80%, then 300 Blackout 10%), mostly on mid-length gas (63%, then carbine-length 38%), and mostly AR-15 (92%, then AR-10 8%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today all 6 retailers we track have it in stock. The best price crept up from $15.65 to $18.08 over August 2026. Buying today, the lowest price is $15.65 at Classic Firearms, which matches the best price we saw in August.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 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 45 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 Zeroed Ar-15 Bolt Catch Kit
| Build | Parts | Total |
|---|---|---|
 | 22 | $893.64 |
 | 20 | $1866.52 |
 | 21 | $1300.77 |
 | 19 | $2299.75 |
 | 22 | $2444.80 |
1 global rating
Top reviews
CMMG Zeroed bolt catch kit includes the catch, spring, and plunger. Quality is consistent with CMMG's other parts. Drop in install once the lower is open. Wish the price was lower for whats essentially a bolt catch plus small parts.
