CMMG AR-15 Gas Block Assembly, Low Profile, .750
Click to see full view
CMMG
Overview
The Cmmg AR-15 Gas Block Assembly is a low profile component designed for a .750-inch gas block diameter, making it a reliable choice for standard gas systems. Constructed from steel and finished with a nitride treatment, this gas block effectively channels gas from the barrel to cycle your action while maintaining a streamlined profile that fits under handguards without adding bulk. This assembly is often found in builds utilizing a carbine gas system, particularly for those chambered in 5.56 NATO.
Specifications
Available Merchants(12)
Prices checked
Price Alert
Build history on GunPartPicker
Builders have been adding the CMMG AR-15 Gas Block Assembly, Low Profile, .750 to their builds on GunPartPicker since February 2026. All time, it ranks #19 of the 195 gas blocks builders have added. Builds with this gas block are mostly chambered in 5.56 NATO (77%, then .223 Wylde 23%), split between mid-length (57%) and carbine-length (39%) gas systems, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 9 of the 12 retailers we track have it in stock. It dipped to $29.28 at GritR Sports for a stretch in September 2026, well under its usual $38.08, so sales do come around. Buying today, the lowest price is $31.75 at BattleHawk Armory, above September's low of $29.28, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which gas block to pick?
We ranked every gas block by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Gas Block Guide →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
Bravo Company M16 Bolt Carrier Group Black
Bravo Company Mfg Upper Receiver Assembly w/ Laser T-Markings, Hard Coated Anodized - 4-UR-M4
WMD Guns AR-15 Gas Tube Nitromet Mid-Length
FAXON Firearms 16" 223 Wylde Match Barrel Stainless Steel Black
Radian Weapons AR-15 Raptor-SD Ambidextrous Charging Handle OD Green
Midwest Industries Quad Rail AR-15 Handguard - 15"
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all 8 →Builds in the community that include the Cmmg Ar-15 Gas Block Assembly, Low Profile, .750
| Build | Parts | Total |
|---|---|---|
 | 22 | $1392.22 |
 | 20 | $795.77 |
 | 19 | $3851.27 |
| 17 | $1808.03 |
 | 15 | $2862.40 |
 | 19 | $1473.47 |
 | 17 | $2294.51 |
 | 24 | $3224.35 |
No reviews yet. Be the first to review this product!