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.


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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.
Based on build data

CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B

Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension

Alg Defense Qms Ar-15 Trigger Set
Trigger
Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black
Gas Block
Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length
Gas Tube
Timber Creek AR Oversized Trigger Guard, Black - AR OTG B
Trigger GuardAggregated and anonymized data showing how builders use this product
| Product | Category | Times Built Together |
|---|---|---|
| CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B | 34 | |
| Bravo Company Ar-15/m16 Bcm Mil-Spec 6 Position Receiver Extension | 26 | |
| Alg Defense Qms Ar-15 Trigger Set | Trigger | 26 |
| Wilson Combat Ar-15 Lo-Profile Gas Block .750" Black | Gas Block | 24 |
| Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | Gas Tube | 22 |
| Timber Creek AR Oversized Trigger Guard, Black - AR OTG B | Trigger Guard | 22 |
| Platform | Percentage |
|---|---|
| AR-15 | 80.4% |
| AR-10 | 16.1% |
| AR-9 | 3.6% |
| Caliber | Percentage |
|---|---|
| 5.56 NATO | 71% |
| .223 Wylde | 12% |
| 300 Blackout | 5% |
| .308 Win | 3% |
| 9mm | 3% |
| 6mm ARC | 2% |
| .204 Ruger | 1% |
| .450 Bushmaster | 1% |
| 6.8 SPC II | 1% |
| 7.62x39mm | 1% |
| Gas System | Percentage |
|---|---|
| Mid-Length | 43.3% |
| Carbine | 33.3% |
| Rifle | 13.3% |
| Pistol | 7.8% |
| Blowback | 1.1% |
| Intermediate | 1.1% |
Builds in the community that include the Wmd Guns Nitromet Ar-15 Bolt Catch
| Build | Parts | Total |
|---|---|---|
![]() | 26 | $3335.22 |
![]() | 20 | $1422.35 |
![]() | 27 | $2104.50 |
![]() | 18 | $1542.54 |
![]() | 32 | $7199.62 |
![]() | 20 | $975.40 |
![]() | 22 | $1601.47 |
![]() | 29 | $1719.86 |
![]() | 20 | $973.34 |
![]() | 25 | $1877.73 |
![]() | 25 | $1877.73 |
![]() | 26 | $1799.05 |
4 global ratings
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.