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FX STX Superior Heavy Liner, 700mm, .22 caliber

Main Product Rating 3.03.0 (3 reviews)
FX STX Superior Heavy Liner, 700mm, .22 caliber

FX STX Superior, Image 1

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List Price $129.99Save $20.00(15%)

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.22 (5.5mm)
.25 (6.35mm)
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Estimated in-stock date 06-05-24

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Out of stock
Estimated in-stock date 06-05-2024. Place your order now for delivery priority!

This FX Superior Smooth Twist X Heavy Barrel Liner (Superior STX Heavy Barrel Liner) will shoot both heavier pellets and heavier slugs with improved performance vs. regular Superior STX barrel liners because of a customized twist rate.

The Superior STX Heavy was created using the same innovative exterior-pressed rifling, but with tighter tolerances and upgraded techniques and for greater precision.

This 700mm version gives you a little more speed than the shorter versions, making it ideal for long-range shooting. If you're looking for an easy way to upgrade your FX air rifle, get a Superior STX barrel liner and drop it in today.

FX Superior STX Heavy Liner, 700mm, .22 caliber

  • Recommended for use with heavy pellets and slugs
  • Compatible with FX Crown Continuum, Impact, and Wildcat models with 700mm STX barrels

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Item Code: FX20206S [PY-A-9667]

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Caliber.22 (5.5mm)
Weight0.25 lbs

Average Customer Review

Rating 3.03.0 (3 reviews)
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Rating 4.04.0 4.0

Rating 3.03.0 3.0

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Things I liked:

In my Maverick Sniper 700mm the Heavy liner allows me to shoot at higher velocities than the standard liner. This gives me a slightly flatter trajectory and allows me to shoot heaver slugs giving me greater stopping power on larger game and bringing the gun up to its potential.

Things I would have changed:

The Heavy liner seems to work best with slug weights 26gr and above. And with velocities 930-1020fps. With higher reg. pressures. The Standard liner seems to cap out at 26gr and below. And velocities below 950 fps. (860-920 fps preferred). And with lower reg. pressures. Both liners have ammo, slug mfgs., weights they prefer and many they don’t prefer. I find each seem to prefer 3/10 slug combinations I try regardless of the tune. With the standard being easier to tune (probably due to lower reg. pressure), but when the heavy is tuned, it is a tack driver. My standard liner is preferring 0.217 slugs and my Heavy preferring 0.218 slugs, yours may vary.

What others should know:

If you are not planning on pushing beyond 26gr, 930fps, 100-150 yards at 1-1.5MOA limit ever you may not want to consider this liner. The standard liner will serve you very well. I shot 26gr Jav. Gen1’s at 900 fps for a year sub-MOA at 150 yards with the standard liner. It was the only load that shot that well, but I also had several good loads at MOA and 1.5 MOA at 100 yards too with 21 & 23grs. All never exceeding 930fps. Fine for hunting. But If I need to push out beyond 150 yards the 26grs open up around 165 yards and become unstable and the 21&23 around the 120yard mark. With the Heavy liner I am able to use 28-31.2gr and reach out 150 to beyond 200 yards while keeping within the 1-1.5MOA range, slug depended. And I haven’t tested farther yet. Keep the velocities around 950-1000fps. The Heavy likes it faster than the standard. Slug your barrel for a diameter check, then buy packages of many different brands and weights of slugs to test.

Rating 4.04.0 4.0

Rating 2.02.0 2.0

Things I liked:

I got this liner to shoot heavier slugs over 23gn. But my standard superior shoots just as good. And actually shoots a broader range of slugs and pellets than the heavy. But Ive not tried anything over 28 gn in the heavy,so maybe it will shoot those.

What others should know:

If you have a standard superior liner and all your gonna shoot is pellets and slugs under 23 gn. Don't waste your money on the heavy liner.

Rating 1.01.0 1.0

Rating 1.01.0 1.0

Things I liked:

I like fox products but disappointed in Pyramid Air.

Things I would have changed:

Buy from a different place.

What others should know:

The barrel I received had pencil marks on it. It was apparently a return.

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  • Robert from USA asked:

    What is the twist rate for the FX STX Superior Heavy Liner 700mm, .22 cal? I am seeing that there are 1:18 and 1:16 , which one do you have for sale?

    • Adam from USA answered:

      We will have whatever FX's current production is.

  • Billy from USA asked:

    What is the outside diameter of the 22 heavy barrelWhat is the outside diameter ?

    Compatible with FX STX Superior Heavy Liner, 700mm, .22 caliber

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