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Questions & Answers
What is the internal diameter of these? Manufacturer Answer

The ID is about 1 3/8 inch.

by Franklin Armory, Manufacturer, April 17, 2026
do you know the I.D & O.D.(diameter) of this handguard? it doesn't have anything listed ???? Expert Answer

Franklin Armory does not provide the inner or outer diameter of their FSR Handguards. Franklin Armory only states that barrels with a diameter greater than 1 inch will not fit with the FSR handguard. I would recommend reaching out to Franklin Armory directly for more information.

by Ethan, Gear Expert, November 10, 2022
Customer Reviews
Helpful Positive Review
Franklin Armory FSR Handguard by David Jones, Verified Owner, May 14, 2025
I really like the handguard. It is an innovative design, just what I was looking for. Optics Planet's prices are usually the best, and fast shipping. One of my first places to shop...
1/1 found this helpful
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3 Models Available
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Product Info for Franklin Armory FSR Handguard

The Franklin Armory FSR handguard is offered in multiple sizes (11.5 inch, 13 inch, and 15inch) that features a four picatinny sides on both the front a rear of the handguard. The three sided smooth midsection is both ergonomic and comfortable but also can accept many name brand rail sections for additional accessories. Free Float and Vented Handguard. Ultra narrow, comfortable, and easy to grasp midsection. Utilizes Picatinny Rails at front where needed. Full Length Picatinny Rail on Top. Closed Ports Adjacent to Gas Block Location for Safety and Comfort. Two QD Sling Mounts on each side. 6061-T6 Material. Hard Coat Type III Anodized Black. Barrel Nut Included. Available in 15 inch, 13 inch, and 11.5 inch rail Lengths. WEIGHT: FSR 11.5 inch Handguard - 15.3 oz. FSR 13 inch Handguard - 16.5 oz. FSR 15 inch Handguard - 17.1 oz. SPECIAL NOTE: Barrels with a diameter greater than 1 inch will not fit with the FSR handguard.image

WARNING: California`s Proposition 65

Specifications for Franklin Armory FSR Handguard:

Manufacturer: Franklin Armory
Color: Black
Finish: Type III Hardcoat Anodized
Fabric/Material: 6061-T6 Aluminum
Gun Make: AR Platform
Gun Type: Rifle
Gun Rail: Picatinny
Additional Features: Free Float and Vented
Included Accessories: Standard
Mount Type: Picatinny
Quantity: 1

Package Contents:

  • Franklin Armory FSR Handguard

Franklin Armory FSR Handguard Orderable Models

List of Orderable Models

  • Franklin Armory 11.5 inch FSR Handguard, Black, 00-52710-BLK , MPN: 00-52710-BLK , Code: 2G2-HZ-FAFSRHG-00-52710-BLK
  • Franklin Armory 15 inch FSR Handguard, Black, 00-52714-BLK , MPN: 00-52714-BLK , Code: 2G2-HZ-FAFSRHG-00-52714-BLK
  • Franklin Armory 13 inch FSR Handguard, Black, 00-52712-BLK , MPN: 00-52712-BLK , Code: 2G2-HZ-FAFSRHG-00-52712-BLK
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