Suppressor guide · Plan B mounts
Rein in the noise™
What “Plan B compatible” means, how a 3 prong mount holds your suppressor, and which thread fits your AR-15. Plus the One Horse Pike 3 Prong and the Ashe and Ryn suppressors that use it.
A Plan B compatible flash hider in 1/2×28 or 5/8×24.
The Ashe comes with the 1/2×28 Pike. The Ryn comes with the 5/8×24 Pike.
One Horse suppressors are made in Brownstown, Indiana.
A Plan B mount is a taper-style suppressor mount. A Plan B compatible muzzle device goes on your barrel, a matching mount goes in the back of the suppressor, and the suppressor threads on and seats on a taper. One Horse’s Plan B compatible muzzle device is the Pike 3 Prong, a 3 prong flash hider sold in 1/2×28 and 5/8×24. The Ashe comes with the 1/2×28 Pike and the Ryn comes with the 5/8×24 Pike.
Key facts
Specs come from One Horse product pages and the One Horse suppressor owner’s manual.
The basics
A Plan B mount is a way to attach a suppressor to your rifle. It uses two parts that fit together.
The suppressor threads onto the muzzle device. As you snug it down, a taper in front of the threads pulls the two parts together and lines them up.
Plan B started as a suppressor mount from Q, a suppressor maker. Today many companies make muzzle devices and mounts built to fit the same pattern. That is what “Plan B compatible” means.
Parts from different makers are built to fit together. Still, check both makers’ compatibility notes before you mix brands.
3 prong mounts
“3 prong” describes the front of a flash hider. It has three open prongs that help cut down visible muzzle flash. A 3 prong Plan B mount does two jobs. It works as a flash hider when you shoot without a suppressor. It is also the base your suppressor locks onto.
Your barrel’s threads decide which version you need. 5.56 barrels are usually 1/2×28. .300 BLK barrels are usually 5/8×24. Your muzzle device and suppressor mount have to match the barrel’s threads.
| Barrel thread | Pike 3 Prong | One Horse suppressor |
|---|---|---|
| 1/2×28 (usually 5.56) | 1/2×28 Pike 3 Prong (OH-PB01) | Ashe 5.56/.223, included |
| 5/8×24 (usually .300 BLK) | 5/8×24 Pike 3 Prong (OH-PB02) | Ryn .30 cal, included |
Not sure what your barrel has? Our AR-15 parts list covers thread pitch and what has to match. Shop One Horse AR-15 barrels.
Why Plan B
The taper gives a wide contact surface. It helps center the suppressor and hold it tight.
The taper seals in front of the threads. That helps keep carbon off them.
No latches and no springs. Just a muzzle device, a mount and the suppressor.
Plan B compatible devices come from many makers, in 1/2×28 and 5/8×24. You can put a Pike 3 Prong on each rifle you want to suppress, then move your suppressor between them. Match each Pike to that barrel’s threads, and only use calibers your suppressor is rated for.
One Horse Plan B mount
The Pike 3 Prong is One Horse’s Plan B compatible mount. It is a 3 prong flash hider that threads onto your barrel. It comes in two thread sizes, so you can match it to your rifle.
Each One Horse suppressor already comes with one. The Ashe comes with the 1/2×28 Pike. The Ryn comes with the 5/8×24 Pike. Buy extra Pike 3 Prongs for your other rifles.
Material, length, weight and torque are from the One Horse suppressor owner’s manual. Thread sizes and SKUs are from the product pages.
SKU: OH-PB01
SKU: OH-PB02
One Horse suppressors
Both One Horse suppressors use the Pike 3 Prong. Both are Grade 5 titanium with a hard coat Cerakote finish and a 1.5″ diameter. Both come in black or FDE. Neither is rated for magnum or high-pressure calibers.
SKU: OH-ASHE556
SKU: OH-RYN30
How to order: order your suppressor online at theonehorse.com and we ship it to your dealer. When it arrives, you fill out a 4473 at your dealer. Once approved, you take it home. Want the full story? Read One Horse Reins in the Noise or see all One Horse suppressors and suppressor heat covers.
Install and care
These are the basic steps from the One Horse owner’s manual. Read the full manual before you install.
Tapered barrel shoulder? It is not supported unless an approved adapter or taper cap is installed first.
Build it right
A suppressor changes how your AR-15 runs. Cans add back pressure. A heavier buffer is a good place to start on a suppressed rifle. Tune from there.
FAQ
A Plan B mount is a taper-style way to attach a suppressor. A Plan B compatible muzzle device threads onto your barrel. A matching mount threads into the back of the suppressor. The suppressor then threads onto the muzzle device and seats on a taper in front of the threads.
It means a part is made to fit the Plan B pattern, so it can work with other Plan B compatible parts. Many companies make Plan B compatible muzzle devices and mounts. Before you mix brands, check both makers’ compatibility notes.
Not always. “3 prong” describes the shape of a flash hider: three open prongs at the front. “Plan B” describes how the suppressor attaches. The One Horse Pike 3 Prong is both: a 3 prong flash hider made as a Plan B compatible mount.
Match your barrel’s muzzle threads. 5.56 barrels are usually 1/2×28 and .300 BLK barrels are usually 5/8×24, but check your barrel before you buy. The Pike 3 Prong comes in 1/2×28 and 5/8×24.
Yes. The Ashe comes with the 1/2×28 Pike 3 Prong. The Ryn comes with the 5/8×24 Pike 3 Prong. Each also comes with a Plan B compatible mount for the suppressor. Extra Pike 3 Prongs are sold separately for your other rifles.
Order it online at theonehorse.com. We ship it to your dealer. When it arrives, you fill out a 4473 at your dealer. Once approved, you take it home.
One Horse suppressors · Rein in the noise™
The Ashe comes with the 1/2×28 Pike 3 Prong. The Ryn comes with the 5/8×24 Pike 3 Prong. Order online and we ship to your dealer (when it arrives, you fill out a 4473 there). Add a Pike to each rifle you want to suppress.
Own a gun shop? Become a One Horse dealer and stock the Ashe, the Ryn and the Pike 3 Prong in your store.
