*Offer expires 12/3/22 at 3:00 a.m. ET. Some exclusions apply.
$109.99
List Price $129.99Save $20.00(15%)Warranty: N/A
Excluded from coupons
Earn 110 Bullseye Bucks
Out of Stock
This item is past due. Check back for updates.
Notify me when product becomes available
Sold & shipped by PyramydAir
Sold & shipped by PyramydAir
This FX Superior Smooth Twist X Barrel Liner (Superior STX Barrel Liner) was created using the same innovative exterior-pressed rifling, but using upgraded techniques and tighter tolerances for greater precision. The Superior STX will shoot both pellets and slugs with improved accuracy over the regular STX barrel liners. Shooters will see the greatest accuracy from FX's new .25 caliber Hybrid Slugs using the Superior STX barrel liner. This 600mm version gives a little more velocity than the shorter versions while keeping the length almost 4 inches shorter than the 700mm version. 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 Liner, 600mm, .25 caliber
This item is not eligible for coupon discounts
Item Code: FX19966S [PY-A-9557]
Sold & shipped by PyramydAir
| Caliber | .25 (6.35mm) |
| Weight | 0.25 lbs |
Create an online review
5.0 5.0
5.0 5.0
Very accurate with any slug, but slug on slug with this on my 600 mm crown and FX Hybrid slugs.
Things I would have changed:nothing, just come out with the .22, 30 and 35 barrels real soon in 700mm and 800mm barrels.
What others should know:You will go thru a 100 piece box real fast with the new slugs.
Got a question or answer?
Log in to participate
4.5 (52 reviews)
4.5 (28 reviews)
4.5 (9 reviews)
4.5 (9 reviews)
5.0 (3 reviews)
4.5 (7 reviews)
4.5 (5 reviews)
4.5 (230 reviews)In-stock
4.5 (156 reviews)In-stock
4.5 (106 reviews)In-stock
5.0 (55 reviews)In-stock
4.5 (46 reviews)In-stock
5.0 (32 reviews)Out of Stock
This item is past due. Check back for updates.
5.0 (27 reviews)
4.5 (19 reviews)
5.0 (13 reviews)In-stock
Get FREE shipping on qualifying orders!
Any order $150+ with a shipping address in the contiguous US
will receive the option for free ground shipping on items sold & shipped by Pyramyd Air during checkout.
Certain restrictions apply.
Free shipping may not be combined with a coupon unless stated otherwise.
View Shipping Info
We work hard to get all orders placed by 12 pm EST out the door within 24 hours on weekdays
because we know how excited you are to receive your order.
Weekends and holiday shipping times will vary.
During busy holidays, we step our efforts to ship all orders as fast as possible,
but you may experience an additional 1-2 day delay before your order ships.
This may also happen if you change your order during processing.
View Shipping Times
It's important to know that due to state and local laws, there are certain restrictions for various products.
It's up to you to research and comply with the laws in your state, county, and city.
If you live in a state or city where air guns are treated as firearms you may be able to take advantage of our FFL special program.
U.S. federal law requires that all airsoft guns are sold with a 1/4-inch blaze orange muzzle
or an orange flash hider to avoid the guns being mistaken for firearms.
View Shipping Restrictions
We have a team of expert technicians and a complete repair shop that are able to service a large variety of brands/models of airguns.
Additionally, we are a factory-authorized repair/warranty station for popular brands such as
Air Arms, Air Venturi, Crosman, Diana, Seneca, and Weihrauch airguns.
Our experts also offer exclusive 10-for-$10 Test and 20-for-$20 Service,
which evaluates your air gun prior to leaving our warehouse.
You'll be able to add these services as you place your order.
View Service Info
Shop and purchase with confidence knowing that all of our air guns (except airsoft) are protected
by a minimum 1-year manufacturer's warranty from the date of purchase unless otherwise noted on the product page.
A warranty is provided by each manufacturer to ensure that your product is free of defect in both materials and workmanship.
View Warranty Details
Didn't get what you wanted or have a problem? We've got you covered! Return any item in new, unopened condition along with its original packaging and any accessories that might have come with your product and receive a refund within 60 days of purchase.
Our customer service team can help determine the best course of action and provide you with some options in the event you're interested in a return.
Learn About Returns
Join the Pyramyd Air mailing list: Our e-mails are filled with new products, deals, sneak peeks, tips and tricks, contests and more - sign up today!
Airgun safety is no accident. You must be 18 years or older to buy any air gun or air rifle in our store.
Text JOIN to 91256 and get $10 Off Your Next $50+ Order.
* By providing your number above, you agree to receive recurring autodialed marketing text msgs (e.g. cart reminders) to the mobile number used at opt-in from Pyramyd Air on 91256. Reply with birthday MM/DD/YYYY to verify legal age of 18+ in order to receive texts. Consent is not a condition of purchase. Msg frequency may vary. Msg & data rates may apply. Reply HELP for help and STOP to cancel. See Terms and Conditions & Privacy Policy.
Customer Support
Shopping Services
Confident Shopping
By Jason
5.0 5.0
5.0 5.0
Verified Purchase
Great upgrade from the STX barrel. Now I can shoot slugs with no problem. This one loves NSA 26.8's so far at 950fps out of my Dreamline Lite in .25cal. 1/2 inch accuracy at 50, which was better than the FX version. Next would be JSB knockouts 33.49 where almost 1/2 inch at 50. more like 3/4 inch groups. It shoot all pellets as well as the old barrel except Baracudas where not as accurate as the pellet liner A.
Things I would have changed:Nothing.
What others should know:Every superior liners shoots differently. My 700mm 25cal standard liner does not like 26.8 NSA's but shoots the FX slugs dead on at 950fps. It also has 1 hole accuracy with JSB knockouts at 950fps out of my Maverick. So every liner, ever at the same speed doesn't alway like the same slugs. Both shoot pellets extremely well. So unless you are going heavier than 34 grain in slugs, there should be no reason to get the Heavy liner.