LBE Unlimited AR-15 Front Sight Base Iron Sight
LBE Unlimited
$42.69
(No reviews yet)
Write a Review
LBE Unlimited
LBE Unlimited AR-15 Front Sight Base Iron Sight
The LBE Unlimited F-Marked Front Sight Base is a complete, mil-spec kit designed to restore, build, or upgrade your AR-15 with a reliable and accurate fixed iron sight system.
- F-Marked front sight base ensures correct sight alignment with flat-top uppers
- Complete kit includes taper pins, sight post, detent, spring, swivel, and swivel rivet
- Mil-spec steel construction delivers lasting durability under hard use
- Drop-in compatible with standard AR-15 barrels and gas system configurations
- Swivel and rivet included for sling attachment right out of the box
- Manufactured by LBE Unlimited, a trusted name in quality AR-15 components
Who This Is For
This front sight base kit is ideal for AR-15 builders completing a new rifle, shooters replacing a worn or damaged sight base, and traditionalists who prefer a proven fixed iron sight over optics-only setups. Whether you're assembling a duty rifle or a dependable range gun, the LBE front sight base gives you everything needed for a proper, secure installation.
Specifications
| Brand | LBE Unlimited |
|---|---|
| Model | F-Marked Front Sight Base Kit |
| Compatibility | AR-15 / M16 platform |
| Marking | F-Marked (flat-top compatible) |
| Material | Mil-spec steel |
| Finish | Manganese phosphate (Parkerized) |
| Includes | Sight base, taper pins, sight post, detent, spring, swivel, swivel rivet |
| Installation | Taper pin mount |
| Country of Origin | USA |
Frequently Asked Questions
What does "F-Marked" mean on an AR-15 front sight base?
The "F" marking indicates that the front sight base has a slightly taller sight post tower compared to an unmarked base. This height difference is engineered to align correctly with the flat-top upper receivers (Picatinny rail height) that are standard on modern AR-15s, ensuring your iron sight co-witnesses properly with optics and backup sights.
Is this front sight base compatible with any gas system length?
This LBE front sight base is designed for standard carbine-length gas systems, which are the most common configuration on AR-15 rifles. If you are running a mid-length or rifle-length gas system, verify the gas port spacing on your barrel before purchasing to ensure proper fit and function.
Do I need any special tools to install the front sight base?
Yes — installing a taper-pin front sight base requires a taper punch set and a bench block or barrel vise to secure the barrel during installation. The taper pins must be driven in from the correct direction (small end forward on the right side of the barrel). If you are not familiar with the process, professional installation by a qualified gunsmith is recommended to avoid damaging the barrel or sight base.
