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Questions & Answers
Can I use a standard gas tube to install this gas block? Not a proprietary gas tube?

I just discovered a straight gas tube is required, NOT one that is angled to clear the barrel nut. This can change what handguard will work with it too.

by David Henley, Verified Owner, November 14, 2024
Customer Reviews
Most Recent Reviews
Awesome Quality by Sterling, Verified Owner, January 22, 2026
I bought the wrong size tho. Accident getting replacement from Optics Planet this next week.
Most Recent Reviews
very good but not perfect by DZ, Verified Owner, December 27, 2025
I wish this option the 3.3 length had knurled edge like the shortest option has. I find it very difficult to turn. Make sure you have at least and inch protrusion past the handguard. I did multiple measurements and tried to go with the most integrate...
Read More...
Read All 2 Reviews
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Product Info for Riflespeed Gas Control .625in Assembly Block

The revolutionary RIFLESPEED Gas Control System (US Patents #US20200116446A1, #US10724812B2, plus additional patents pending) makes controlling your rifle's gas flow reliable, repeatable, and foolproof. Need more gas? Turn it up. Need less gas? Turn it down. With the easy-to-grasp Control Knob, it's that simple and no tools are required. The highly visible numbering on the Control Knob ensures that you'll always know your setting. Return to a previous setting instantly by simply turning the Control Knob. Each setting is indicated by a highly tactile "click" for use during times of reduced visibility. The modular design with multiple Plunger sizes cover the adjustment requirements for every available cartridge. The patented Rotation Stop feature prevents unintentional disassembly. Gas Controls require the use of RIFLESPEED or other straight gas tubesimage

Designed for the most rigorous Military or LE Duty Use, RIFLESPEED Gas Controls are also ideal for defensive use, competition, recreational shooting, or hunting. RIFLESPEED Gas Controls are durable and proven to perform through tens of thousands of rounds of ammunition spent in developmental and destructive testing. Gas Controls from RIFLESPEED are the ultimate solution to the problems of operating hard-use carbines in varying conditions, configurations, and environments.

With complete control of the gas that's delivered to the action of your rifle with each shot you'll enjoy increased reliability, reduced recoil, reduced muzzle rise, less aiming disruption, less wear and tear on your rifle, and improved accuracy. Set your RIFLESPEED Gas Control for ideal performance with light commercial ammo or higher-pressure milspec ammo. Dial your gas system in for ideal performance in extreme heat or frigid cold conditions. Enjoy optimal performance with or without a suppressor. With a properly adjusted gas system you can eliminate the need to use exceedingly heavy buffers. Once you experience the advantages of using a RIFLESPEED Gas Control, youll never want to shoot anything else.

WARNING: California`s Proposition 65

Specifications for Riflespeed Gas Control .625in Assembly Block:

Manufacturer: Riflespeed
Color: Black
Coating: QPQ
Fabric/Material: Steel
Gas Block Journal Size-Diameter: .625 in
Caliber: 6.5mm Grendel, 7.62x51mm NATO, 5.56x45mm NATO, .300 AAC Blackout, 6.8mm Remington SPC, .308 Winchester, .223 Remington
Gun Model: AR-10, AR-15
Condition: New
Finish: Nitride

Features of Riflespeed Gas Control .625in Assembly Block

  • Distinct numbered settings for easy status identification and repeatability
  • Multiple lengths available for use even while tucked under extended handguards
  • Modular design allows user-level configuration and maintenance
  • Rotation limited to avoid possibility of unintentional disassembly

Package Contents:

  • Riflespeed Gas Control .625in Assembly Block

Riflespeed Gas Control .625in Assembly Block Orderable Models

List of Orderable Models

  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6219, US0123 , MPN: US0123 , Code: 62W-RGB-GCG1-US0123
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6243, US0125 , MPN: US0125 , Code: 62W-RGB-GCG1-US0125
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6233, US0124 , MPN: US0124 , Code: 62W-RGB-GCG1-US0124
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6259, US0175 , MPN: US0175 , Code: 62W-RGB-GCG1-US0175
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6236, US0172 , MPN: US0172 , Code: 62W-RGB-GCG1-US0172
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6221, US0127 , MPN: US0127 , Code: 62W-RGB-GCG1-US0127
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6224, US0183 , MPN: US0183 , Code: 62W-RGB-GCG1-US0183
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6248, US0128 , MPN: US0128 , UPC: 4167655 , Code: 62W-RGB-GCG1-US0128
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6234, US0186 , MPN: US0186 , Code: 62W-RGB-GCG1-US0186
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6244, US0179 , MPN: US0179 , Code: 62W-RGB-GCG1-US0179
  • Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6258, US0126 , MPN: US0126 , Code: 62W-RGB-GCG1-US0126

Riflespeed Gas Control .625in Assembly Block Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6233, US0124 , MPN: US0124-EDEMO , Code: 62W-RGB-GCG1-US0124-EDEMO-DF-D
  • USED, Riflespeed Gas Control .625in Assembly Block, AR15/AR10, RS6219, US0123 , MPN: US0123-EDEMO , Code: 62W-RGB-GCG1-US0123-EDEMO-IN-C
  • USED, Riflespeed RS6221 Gas Control Assembly, Black Nitride QPQ, 0.625in Diameter, 2.1in Length, US0127 , MPN: US0127-EDEMO , Code: 62W-RGB-GCG1-US0127-EDEMO-DF-C
  • USED, Riflespeed RS6219 Gas Control Assembly, Black Nitride QPQ, 0.625in Diameter, 1.9in Length, US0123 , MPN: US0123-EDEMO , Code: 62W-RGB-GCG1-US0123-EDEMO-RE-B
  • USED, Riflespeed RS6221 Gas Control Assembly, Black Nitride QPQ, 0.625in Diameter, 2.1in Length, US0127 , MPN: US0127-EDEMO , Code: 62W-RGB-GCG1-US0127-EDEMO-RE-C
  • DEMO, Riflespeed RS6243 Gas Control Assembly, Black Nitride QPQ, 0.625in Diameter, 4.3in Length, US0125 , MPN: US0125-DEMO , Code: 62W-RGB-GCG1-US0125-DEMO
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