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DoubleStar's HBAR Front Sight Housing is the go-to piece when you want to build or restore a fixed front sight setup on your AR-15. This is the classic A2-style triangular tower that gives the rifle that unmistakable service-rifle look, and it comes complete with an integral bayonet lug so you get the authentic profile right out of the gate. It's built as a direct replacement for a factory front sight base, which makes it handy for restoring an older rifle or starting a fresh build from a bare barrel.
The tower is forged from C1137 steel, then heat-treated for strength before being machined to military specifications. That forged-and-treated construction is what separates a housing that holds zero and takes a beating from the cheap cast stuff. The matte black Parkerized finish matches standard mil-spec coloring, so it sits right next to the rest of your parts without looking out of place. Height from the top of the barrel to the top of the housing runs about 1.9 inches before you drop in a sight blade.
This one is cut for HBAR barrels, meaning it fits the .750 inch outer diameter used on M16A2 and M4 contour heavy barrels. It ships ready to accept an A1 or A2 front sight post, spring, and detent of your choosing, so you can pick the blade style you prefer. The sling swivel rivet hole comes predrilled to save you a step.
The housing arrives without the cross holes drilled, which is by design. You'll need to drill for taper pins or tap for set screws to lock it to your barrel and line up with the gas port. Plenty of builders go the set screw route since it skips the stress of drilling a fresh barrel, though taper pins remain the traditional mil-spec method. If you're not comfortable with a drill press and proper alignment, this is a job worth handing to a gunsmith to get the gas port lined up right the first time.
No, the housing ships bare and is ready to accept an A1 or A2 front sight post, spring, and detent of your choosing. That lets you match the blade style to your build. You'll want to pick those parts up separately if you don't already have them on hand.
It's cut for HBAR barrels with a .750 inch outer diameter, which covers M16A2 and M4 heavy barrel contours. If your barrel measures .750 inches at the sight base area, you're in the right spot. Lightweight profile barrels use a different housing, so double-check your barrel diameter first.
The housing arrives without the cross holes drilled, so you'll need to drill for taper pins or tap for set screws to secure it. The sling swivel rivet hole is already predrilled to save you a step. Getting the gas port aligned correctly is critical, so many folks hand this install to a gunsmith if they don't have a drill press and the right tooling.
Yes, the bayonet lug is forged as part of the housing, so it's there from the start. That's a big reason builders reach for this piece when they want the authentic service-rifle appearance. Nothing extra to add for the classic military profile.
| UPC | 841348103783 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | AR448 |
| Color | Black |
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