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WMD Guns
Overview
The WMD Guns AR-15 Gas Tube is designed for a mid-length gas system, which optimizes the timing and cycling of the action, ensuring reliable operation. Made from carbon steel and finished with a nitride coating, this gas tube offers enhanced durability and corrosion resistance, crucial for maintaining performance in various conditions. This gas tube is commonly found in builds featuring a mid-length gas system and chambered in 5.56 NATO.
WMD Guns AR-15 Gas Tube Nitromet Mid-Length was the most added gas tube on GunPartPicker in September 2026, ahead of the Sons of Liberty Gun Works AR-15 Gas Tube Stainless Steel Mid-Length, with about 18% of all gas tubes added to builds. That's its 5th straight month at #1. Builds with this gas tube are mostly chambered in 5.56 NATO (67%, then .223 Wylde 21%), mostly on mid-length gas (65%, then carbine-length 17%), and mostly AR-15 (90%).
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 4 of the 5 retailers we track have it in stock. It dipped to $14.40 at BattleHawk Armory for a stretch in September 2026, well under its usual $17.99, so sales do come around. Buying today, the lowest price is $14.40 at BattleHawk Armory, which matches the best price we saw in September.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
We ranked every gas tube by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Gas Tube Guide →Check it against the live catalog:
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Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length
| Build | Parts | Total |
|---|---|---|
 | 23 | $2419.33 |
 | 13 | $2587.59 |
 | 12 | $651.79 |
 | 14 | $2967.59 |
 | 9 | $653.38 |
 | 18 | $1234.97 |
 | 12 | $1204.25 |
| 17 | $807.25 |
 | 7 | $1104.10 |
| 31 | $2749.50 |
 | 15 | $4880.53 |
 | 24 | $6973.90 |
4 global ratings
Top reviews
gas tube functions correctly, no issues with gas signature or carrier speed. the nitromet finish on mine came with a slight color shift toward bronze compared to the catalog black, under a handguard nobody sees it but worth noting
WMD Guns Nitromet mid length gas tube has solid fit and finish. Dark nitride coating is more durable than parkerized. Pin holes line up correctly. Cycles a 16 inch carbine without any issues. Same coating as their full BCG.
tube is correctly drilled and straight, no concerns there. install required a couple extra checks because the roll pin hole on the gas block side was slightly offset on mine, drove the pin with a smaller starter punch first to get it lined up. works fine after that
Swapped out my plain melonite tube for this WMD Nitromet on a mid length 16 inch build. Coating finish is noticeably more refined than a standard gas tube. Gas key alignment was spot on, no binding when I installed the BCG. Held up fine after 500 rounds suppressed.
