KAK PLAN B A2 FH 5/8X24 .375" BORE

The KAK Plan B A2 flash hider with 5/8x24 threading is a precision muzzle device built for shooters who demand repeatability and solid suppressor integration. This stainless steel flash hider combines a tapered shank with threads, engineered to seat consistently and lock down hard against a suppressor adapter—essential if you're running cans and want zero headspace variability. At 1.85 inches long and just 2.5 ounces, it fits the footprint of a standard A2, so it won't significantly extend your platform or mess with your setup's balance.

Built from 17-4 stainless with nitride finish, the Plan B is tough enough for heavy use and corrosion-resistant enough to handle field conditions. The milled flats on the rear let you wrench it down with confidence using standard armorer's tools. KAK engineered this to work seamlessly with Plan B suppressor hubs, and the tapered design ensures a repeatable seal every time you mount or dismount a can—no rocking, no guessing. If you're building a suppressed rifle or upgrading your muzzle device, the Plan B solves the common problem of devices that don't seat flush or vary under recoil.

Installation is straightforward: use Rocksett (a high-temp threadlocker) and torque to 20–25 ft-lbs. A heads-up: some suppressor manufacturers will void coverage if you pair their cans with non-approved muzzle devices, so verify compatibility with your specific silencer before ordering. The Plan B is made for shooters who won't settle for sloppy, and it shows in every detail.

Key Features

• Tapered shank with threads for repeatable, zero-play lockup with Plan B suppressor hubs
• 17-4 stainless construction with nitride finish for durability and corrosion resistance
• Compact 1.85-inch length and 2.5-ounce weight fit standard A2 profile
• Milled rear flats for secure installation with standard armorer's tools
• Designed for 20–25 ft-lbs torque installation with Rocksett threadlocker

Specifications

Frequently Asked Questions

Is the KAK Plan B compatible with suppressors from other brands?

The Plan B is designed specifically for Plan B suppressor hubs. Some suppressor manufacturers will not honor warranty claims if you use a different muzzle device with their cans, so confirm compatibility with your specific silencer before purchasing.

What tools do I need to install this muzzle device?

You'll need a standard armorer's wrench to engage the milled flats on the rear of the device. Torque to 20–25 ft-lbs using Rocksett threadlocker for proper installation.

What does the tapered design do?

The tapered shank paired with threads creates a repeatable, precise seal between the muzzle device and a suppressor adapter. This ensures consistent lockup and eliminates movement under recoil.

Will this fit my rifle platform?

The Plan B features a 5/8x24 thread pitch and .375" bore, so it will fit rifles threaded to that spec. Verify your barrel's thread pattern and bore size before ordering to ensure compatibility.