Description
Fletcher Rifle Works built the Kimura around a specific job: give SIG suppressor owners a flash hider that mounts up exactly like the factory Taper-Lok hardware, without asking anyone to buy into a whole new mounting ecosystem. This version comes threaded 5/8×24 with a SIG taper shoulder, so it seats against the barrel the same way SIG's own QD flash hiders do, giving you a repeatable, shim-free lockup every time you thread it on.
SIG Taper Shoulder Fit on the Kimura Flash Hider
The taper shoulder is the whole point here. Instead of a flat 90 degree face that can shift slightly with each install, the tapered geometry self-centers against the barrel shoulder, keeping the hider and whatever suppressor you run through a SIG QD mount indexed the same way run after run. That kind of consistency matters more than people think, especially when you're pulling a can on and off between range trips and hunts.
Stainless Construction Built to Handle the Heat
Fletcher machines the Kimura from 17-4 PH stainless steel and runs it through an H900 heat treat, a combination that's become something of a standard in the muzzle device world for good reason. It holds up to sustained heat and carbon buildup better than mild steel, resists corrosion, and keeps its dimensions stable even after a lot of rounds downrange. A .375 inch bore gives it clearance for mid-size and larger platform rifles, and the 3/4 inch wrench flats mean install and removal doesn't turn into a fight in the vise.
More Than Just a SIG Fit
Even though this one's cut for SIG's taper interface, Fletcher designed the Kimura to play nice with other popular quick-detach setups too. It's compatible with Plan B compatible mounts and Q's Cherry Bomb adapters, so if the rest of your suppressor collection isn't strictly SIG, you're not necessarily locked out. Fletcher Rifle Works does its machining out of Texas, and the Kimura carries the same attention to fit and finish the brand's receivers and barrels have built a name on.
Key Specifications
- Manufacturer: Fletcher Rifle Works
- Model: Kimura Flash Hider
- Manufacturer Part Number: KIMURA5/8X24SIG
- UPC: 850044307555
- Thread Pitch: 5/8×24
- Shoulder Type: SIG Taper (Taper-Lok / Clutch-Lok compatible)
- Material: 17-4 PH Stainless Steel
- Heat Treatment: H900
- Bore Diameter: .375 inch
- Wrench Size: 3/4 inch flats
- Suppressor Adapter Compatibility: Plan B Compatible mounts, Q Cherry Bomb adapters
- Country of Origin: Made in USA (Texas)
- Category: AR Muzzle Devices / Flash Hiders
What’s Included
- Fletcher Kimura Flash Hider (5/8×24, SIG taper shoulder)
Frequently Asked Questions
What does the SIG taper shoulder on the Kimura flash hider actually do?
It gives the flash hider a tapered mating surface instead of a flat 90 degree face, which lines up with SIG's Taper-Lok style QD suppressor mounts. That taper self-centers on the barrel shoulder, so you get the same alignment every time you install it instead of relying on shims or careful timing.
Will this Kimura flash hider work with my Q suppressor or Plan B mount?
Yes, even though this version is cut with the SIG taper shoulder, Fletcher built it to be compatible with Plan B compatible mounts and Q's Cherry Bomb adapters. That gives you some flexibility if you run gear outside the SIG ecosystem.
What size wrench do I need to install the Kimura flash hider?
It takes a 3/4 inch wrench on the flats. A thin wall socket or crowfoot wrench makes the job easier if your barrel nut or handguard leaves limited clearance up front.
What is this flash hider made from and how durable is it?
The Kimura is machined from 17-4 PH stainless steel and heat treated to the H900 condition, which is a common spec for high-quality muzzle devices because it resists heat damage, carbon buildup, and corrosion over long-term use. It is built to keep its fit and function even after heavy round counts.





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