Ultradyne USA Quantum Gas Block, .750
$79.00
This tunable .750 steel gas block features a nitride finish and helps competitive shooters achieve a smoother, cooler cycle with reduced recoil.
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Ultradyne USA Quantum Gas Block, .750″
The Quantum gas block gives competitive shooters a tunable .750 steel platform to dial in a smoother, cooler cycle with reduced felt recoil for a specific ammo and rifle combination. Its nitride-finished steel body resists corrosion and holds up to the thermal stress of sustained fire without losing fit on the barrel journal.
For another premium low-profile option, see the Geissele Super Gas Block, or browse more fixed gas blocks.
Key Features
- Tunable .750 gas block for optimized rifle and ammo combinations
- Promotes smoother, cleaner, cooler cycle with reduced recoil
- Steel construction with corrosion-resistant nitride finish
- Built for competitive shooters
- Fits .750 gas block journals
Specifications
| UPC | 850011462386 |
|---|---|
| Manufacturer | Ultradyne USA |
| Manufacturer Part # | UD12001 |
| Model | Quantum |
| Type | Gas Block |
| Material | Steel |
| Finish | Corrosion-Resistant Nitride |
| Diameter | .750″ |
| Subcategory | Long Gun Parts |
| Type | Gas Block |
|---|---|
| Model | Quantum |
| Diameter | .750" |
| Material | Steel |
| Finish | Corrosion-Resistant Nitride |
| Brand |
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Frequently Asked Questions
What barrel diameter does this gas block fit?
This gas block is bored to .750 inches, the most common AR-15 barrel diameter at the gas block seating area. It fits government-profile, M4-profile, and most mid-weight barrels. Always measure your barrel at the gas block location before ordering — installing a gas block with the wrong bore diameter will result in a poor fit that can affect gas system reliability and zero retention.
What makes the Quantum gas block different from a standard low profile block?
The Ultradyne Quantum gas block features precision machining and a low-drag profile designed for free-float handguard builds. It uses set screws for secure barrel attachment and is dimensioned to fit inside most standard free-float handguards without protrusion above the rail line. The tight manufacturing tolerances ensure consistent gas port alignment and a secure fit on the barrel journal.
How do I install this gas block?
Remove the existing front sight base or gas block, thoroughly degrease the barrel journal and the bore of the gas block, align the gas port in the block with the gas port drilled in the barrel, and torque the set screws to manufacturer specifications. Apply thread-locking compound to the set screws to prevent loosening under recoil. Confirm the gas tube seats correctly in the gas block and routes properly to the upper receiver key before completing installation.
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