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CMMG
Overview
The CMMG AR-15 Gas Tube is designed specifically for carbine-length gas systems, ensuring reliable gas flow and optimal cycling for your rifle. Made from polished stainless steel, this gas tube provides durability and corrosion resistance, which is essential for maintaining consistent performance under various conditions. You'll often find this component in builds chambered in 5.56 NATO that are intended for a balanced blend of accuracy and reliability.
CMMG AR-15 Gas Tube Stainless Steel Carbine ranked #13 of the 63 gas tubes builders added on GunPartPicker in August 2026, behind the CMMG AR-15 Gas Tube Stainless Steel Mid-Length, with about 2% of all gas tubes added to builds. Up from #15 in July. Builds with this gas tube are split between 5.56 NATO (57%) and .458 SOCOM (43%), nearly all on carbine-length gas, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today all 7 retailers we track have it in stock. The best price crept up from $13.96 to $16.92 over August 2026. Buying today, the lowest price is $13.96 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 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:
The part most often added in each category by the 36 builds that include this one
PSA AR-15 Bolt Carrier Group 5.56 Full-Auto Nitride MPI - 516446953
FAXON Firearms 16" .458 Socom Carbine Length Gunner Big Bore AR-15 Barrel
PSA AR-15 Built Stealth Upper Receiver - No T Marks - 516444539
PSA AR-15 "Stealth" Stripped Lower Receiver
PSA AR15 A2 Front Sight Gas Block w/Bayonet Lug
Breek Arms AR-15 Warhammer MOD2 Ambidextrous Charging Handle Black
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the Cmmg Ar-15 Gas Tube Stainless Steel Carbine
| Build | Parts | Total |
|---|---|---|
 | 20 | $1866.52 |
 | 20 | $802.16 |
 | 20 | $3994.99 |
 | 9 | $899.99 |
 | 14 | $2476.77 |
 | 25 | $2865.39 |
 | 27 | $2042.91 |
 | 10 | $1286.72 |
 | 21 | $1821.82 |
 | 27 | $1792.67 |
 | 19 | $1444.29 |
 | 11 | $938.70 |
2 global ratings
Top reviews
CMMG stainless steel carbine length gas tube has solid fit and finish. Polished finish is consistent. Pin holes line up correctly. Stainless handles heat better than parkerized after extended fire. Quality CMMG part.
CMMG stainless steel carbine length gas tube has a polished finish that shines through an open top handguard. Pin holes correctly located. Cycles consistently on a 14.5 mid build. Stainless handles heat better than parkerized after extended fire.
