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AR-15 A2 Front Sight Housing w/Bayonet Lug (Non F Marked). Forged steel A2 front sight base with bayonet lug and sling mount. Non F-Marked height – correct for fixed carry handle A2 rifle and retro builds. .750 gas journal, taper pin mount.
In stock – ready to ship
In stock – ready to ship
The AR-15 A2 Front Sight Housing w/Bayonet Lug (Non F Marked) is the correct, authentic foundation for any M16A2, M16A4, M4, or retro AR-15 clone build. Before low-profile gas blocks and flip-up sights became common, the A2 front sight base was the standard — a forged steel housing that combines a front sight tower, gas block, bayonet lug, and sling swivel mount into one rugged, proven unit. This specific model is non-F-marked, which is the correct height for fixed carry handle uppers, A2 rifles, and dissipator builds that use a traditional front sight post with a carry handle rear sight.
Forged from solid steel and finished in mil-spec black, this housing delivers the classic A-frame look that defines the AR-15 platform. It features the full bayonet lug at the bottom for mounting an M7 or M9 bayonet, and the integrated sling swivel attachment point on the bottom for use with a traditional two-point sling. Unlike modern low-profile gas blocks that hide under a free-float handguard, the A2 housing is designed to be visible — sitting at the end of your handguards with a front sight tower that protects your front sight post and provides a fixed, bomb-proof front sight reference. If you are building an M16A2 clone, a government profile build, or simply want the most durable fixed front sight available, this Non F-Marked A2 housing is the correct choice. It is drilled for taper pins and includes the classic .750 gas block diameter that fits most government profile barrels.
Retro-correct, combat-proven, and built to last a lifetime.
1. Non F-Marked Correct Height for Fixed Carry Handle and A2 Rifle Builds: Not all A2 front sight bases are the same. There are two heights — F-Marked and Non F-Marked. This Non F-Marked version is slightly shorter in the sight shelf and is the correct specification for AR-15s with a fixed carry handle upper receiver, such as A2 rifle uppers, C7 uppers, and early M16A2 clones. It ensures your front sight post sits at the correct height to zero properly with an A2 rear sight, giving you a proper sight picture and full elevation adjustment range. F-Marked bases are taller and are intended for flat-top receivers with detachable carry handles or flip-up rear sights. Using the correct Non F-Marked base prevents you from having to crank your front sight post way out of the housing to zero. It gives you a proper military-spec sight height that matches original Colt and FN A2 rifles. The bayonet lug is fully functional and correctly profiled to military dimensions, allowing proper lock-up with standard bayonets and M203-style accessories that index off the lug.
2. Forged Steel Construction Combining Gas Block, Sight Tower, and Mounting Points: This is not an aluminum replica — this A2 front sight housing is forged from 4140 steel for maximum strength, durability, and heat resistance. It is machined to exact mil-spec dimensions with a .750 inch barrel journal that fits standard government, M4, and many medium profile barrels. It serves three functions in one part — it acts as your gas block to cycle the action, as your front sight tower to protect and hold your front sight post, and as your mounting point for a bayonet and front sling. The dual taper pin holes provide the most secure method of attaching a gas block to a barrel — taper pins will not walk out under recoil or heat like set screws can. The forged construction can handle extreme heat from rapid fire, impacts, and hard field use without deforming or loosening. Finished in manganese phosphate or black oxide, it resists corrosion, carbon, and gun solvents and matches the finish of other mil-spec steel parts. This is the most robust, no-fail front sight system ever designed for the AR-15.
3. Perfect for Retro, Clone Correct, and Duty Grade Builds: If you are building an M16A2, M16A4, early M4, or 605 / 604 retro clone, the A2 front sight housing with bayonet lug is mandatory for an authentic look. Even for modern builds, many shooters prefer the A2 front sight because it is the most durable fixed front sight available — it will not fold, break, or lose zero like many aftermarket flip-ups. It provides a constant front sight reference that co-witnesses perfectly with red dot optics in a lower 1/3 configuration, giving you an instant backup sight. Installation is standard — slide over the barrel, align the gas port, drill or use a pre-drilled barrel, and secure with taper pins. It works with standard round or oval handguards with a front handguard cap, or can be used as a standalone gas block/sight with a free-float rail that has an A2 cutout. Whether for a clone-correct historical build or a tough duty rifle, this housing delivers authentic military specification and reliability.
The AR-15 A2 Front Sight Housing w/Bayonet Lug (Non F Marked) is the correct, forged steel A-frame for A2 and fixed carry handle builds.
Type: A2 Front Sight Base / Gas Block. Marking: Non-F-Marked – Correct for A2 Fixed Carry Handle Uppers. Profile: A2 with Bayonet Lug and Sling Swivel Base. Material: Forged Steel 4140. Finish: Mil-Spec Black / Manganese Phosphate. Gas Journal: .750 Diameter. Mounting: Taper Pin Drilled (2-Pin). Functions: Front Sight Tower, Gas Block, Bayonet Lug, Front Sling Mount. Compatibility: AR-15 / M4 / M16 Barrels with .750 Journal, Standard Front Sight Post, and Detent.
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