Click to see full view
WMD Guns
Overview
The WMD Guns Nitromet AR-15 Bolt Catch is a standard-type bolt catch made from durable steel and finished with a nitride coating for enhanced corrosion resistance and durability. This component plays a crucial role in the operation of your rifle by holding the bolt open after the last round is fired, allowing for quick and efficient reloading. This bolt catch is commonly found in mid-length gas system builds chambered in 5.56 NATO, making it a reliable choice for those setups.
WMD Guns Nitromet AR-15 Bolt Catch 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 #16 in July. Builds with this bolt catch are mostly chambered in 5.56 NATO (71%, then .223 Wylde 12%), split between mid-length (43%) and carbine-length (33%) gas systems, and mostly AR-15 (81%, then AR-10 16%).
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today both retailers we track have it in stock. Prices barely moved in August 2026, holding around $8.55, so there haven't been real sales lately. Buying today, the lowest price is $8.55 at Primary Arms, 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 207 builds that include this one
Zro Delta AR-15 Selector Mil-Spec
ALG Defense Qms AR-15 Trigger Set
TPS Arms AR-15 Mag Catch Assembly, Black - AR-1031
Aero Precision Stripped M4E1 AR-15 Lower Receiver - Special Edition - Freedom
HEXMAG Rubber AR-15 Tactical Pistol Grip, Black - HX-HTG-Black
B5 Systems Trigger Guard ATG-001-01
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Wmd Guns Nitromet Ar-15 Bolt Catch
| Build | Parts | Total |
|---|---|---|
 | 26 | $3172.43 |
 | 20 | $1417.35 |
 | 27 | $2159.99 |
 | 18 | $1475.88 |
 | 32 | $7261.07 |
 | 20 | $997.92 |
 | 22 | $1753.37 |
 | 29 | $1876.13 |
 | 20 | $1159.17 |
 | 25 | $2238.31 |
 | 25 | $2238.31 |
 | 26 | $1821.88 |
4 global ratings
Top reviews
WMD Nitromet bolt catch has the dark nitride finish thats slightly different shade than my other nitride parts in direct light. Mechanically perfect, drops in any milspec lower. The nitride coating wears well over time, more durable than parkerized.
WMD does nitride well and a bolt catch is one of those parts that scratches up over time. The Nitromet finish here is darker than parkerization and seems to handle wear. Fitment to my Aero lower was textbook, install in 10 minutes.
Picked up the WMD nitromet for the corrosion resistance, never thought about a bolt catch finish before this. After a couple rainy days at the range it still looks new where my old catch had spots of rust. Drop in fitment on an Anderson lower. Solid little upgrade.
WMD Nitromet bolt catch has held up to repeated use without scratching. The nitride finish is more durable than standard parkerized parts. Drop-in fitment on any milspec lower. Solid little upgrade for the cost.
