Luth-AR 5.5" Flash Hider (BL-55)
If you want the classic extended “moderator-style” look with a simple, durable flash hider, this 5.5" Luth-AR model is a solid choice—especially for builds where extra muzzle device length is part of the plan.
It threads onto standard AR-15 muzzles with 1/2x28 threads and is intended for .223 Rem / 5.56 NATO. /p>
Why people buy the 5.5" style
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Extended length that’s commonly chosen for short-barrel projects where overall length is a consideration (always follow local laws and use a qualified gunsmith for permanent work). /p>
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Retro CAR-15 / moderator-style appearance that’s frequently how shoppers search for this profile.
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Hard-use materials and finish suited to general range and duty-style builds.
Key specs
| Spec | Value |
|---|---|
| Length | 5.5" |
| Thread pitch | 1/2x28 |
| Caliber | .223 Rem / 5.56 NATO |
| Material | 4150 steel |
| Finish | Manganese phosphate |
| Manufacturer part number | BL-55 /td> |
| UPC | 812058031680 /td> |
| Country of origin | Made in USA (as listed by retailers) |
Important note for pin & weld buyers
This model is not pre-drilled for pinning and welding per retailer Q&A. If you’re planning permanent attachment, plan on proper gunsmith work.
Fitment notes
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Confirm your barrel’s muzzle threading is 1/2x28 before ordering.
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Intended for .223/5.56 applications; choose the correct device for other calibers/thread pitches.
FAQ
What barrels does this fit?
It’s intended for .223 Rem / 5.56 NATO barrels with 1/2x28 muzzle threads.
Is it pre-drilled for pin & weld?
No, retailer Q&A indicates it is not pre-drilled for pinning/welding.
What is it made from?
Retailer listings describe 4150 steel with a manganese phosphate finish.
What’s the part number and UPC?
MPN: BL-55 and UPC: 812058031680.
Is this the same thing as a “CAR-15 moderator”?
Many retailers refer to it as CAR-15 style / moderator style based on the look and length. Terminology varies by seller, but this product is sold as a flash hider.
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