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SA Mastery MPX Stealth Fly Line
    SA Mastery MPX Stealth Fly Line
    Purchase SA Mastery MPX Stealth Fly Line
    • SKU: sa-mastery-mpx-stlth
      SA Mastery MPX Stealth Fly Line

    • Customer Reviews ( 16 ) Write A Review
    • $79.95

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    Scientific Angler Mastery MPX Stealth Fly Line is the best all-around fly line that SA has ever made. Mastery MPX Stealth will handle everything from tossing small dries to slinging huge streamers. Built a half-size heavy, the MPX taper is designed with more mass toward the front of the head with an added emphasis on presentation. The Mastery MPX Stealth is a powerful line that loads rods quickly, yet with a bit of finesse added in. This line features a stealthy Willow 30ft tip section perfect for the gin clear waters of NZ and elsewehere.

    These lines are proven performers and feature the AST Plus Slickness Technology to effortlessly shoot line further. AST Plus also makes Mastery MPX Stealth the most durable line, maintaining its slick properties 8 times longer than other fly lines. Mastery MPX Stealth throws bullet loops, increases casting distance, and will make any angler a better caster. Master MPX Stealth also excels at line control, roll casting with ease, and mends line effortlessly for perfect, drag free drifts. This premium SA Mastery MPX Stealth line will do it all extremely well and is the go-to all-purpose freshwater fly line.


    • The ultimate general presentation taper for all situations
    • Features the revolutionary AST Plus slickness additive for superior shooting ability and increased durability
    • Built a half-size heavy to load rods and turn over large flies easily
    • Braided multifilament core
    • Extended rear taper for line control and mending ability
    • Welded front and back loops for quick, easy rigging changes
    • For use in moderate and cold climates
    • Braided multifilament core
    • Color: Amber running line, Willow tip for stealthy presentations


    Mastery MPX Taper


    Cold Water Type

    Medium Water Type




    Poppers / Big Dries



    WF-3-F31.5’ / 9,6m90.0’ / 27,4m110gr / 7,1g
    WF-4-F33.5’ / 10,2m90.0’ / 27,4m130gr / 8,5g
    WF-5-F35.5’ / 10,8m90.0’ / 27,4m150gr / 9,8g
    WF-6-F37.5’ / 11,4m90.0’ / 27,4m175gr / 11,3g
    WF-7-F39.5’ / 12,0m90.0’ / 27,4m200gr / 13,0g
    WF-8-F41.5’ / 12,6m90.0’ / 27,4m225gr / 14,6g
    WF-9-F43.5 / 13,3m90.0’ / 27,4m260gr / 16,8g

    * Grain weight for the first 30′

    Rate Product
    ★★★★★ ★★★★★
    4.94/5 Stars out of 16 Reviews
    Pages 1   2
    Verified Buyer
    Love it
    Chris (ME) | October 5th, 2023
    I’ve changed all my trout and bass lines out for this line. I highly recommend and don’t plan on using another line in the future.
    Verified Buyer
    Favorite line
    Laszlo (Texas) | February 8th, 2023
    This is the first fly line I ever purchased. Though acquired more options this still tends to be my favorite. Cant beat this line for the price. very accurate and forgiving.
    Verified Buyer
    Great fly line
    Stephen M Horn (Bellevue, NE) | December 7th, 2021
    I swapped this line for the line which came with my "starter kit." There is a noticeable improvement in smoothness and ease of casting this line. Wish I had just gone with this line first.
    Verified Buyer
    Lazer Pointer Line
    Danny H (SE Ohio) | July 28th, 2021
    The relatively heavier head on this line loads my TFO Blue Ribbon 6 wt and my Echo Lift 3 wt perfectly. I am surprised at how well this line presents big bass poppers and small dries. I have it on my 6 wt for carp and bass, and on the 3 wt for small stream trout with dries. The 6 wt even does a relatively good job with delicate presentation of warm weather dries for bass. Its a good versatile line.
    Verified Buyer
    Great All Purpose Fly Line
    Martin (No Name, CO) | July 10th, 2021
    Love this fly line since it was GPX. Casts like a dream and delivers the fly where I want it. Fish #22-#2 flies on rivers and lakes with great results on everything. I will buy this again!
    Verified Buyer
    Best all around line you can get
    Tim (Fairbanks, Alaska) | April 10th, 2021
    I fell in love with SA's GPX line years ago, and this is the new rendition of that taper. I tend to favor medium-fast rods over the fast to super fast rocket launchers. They call this line a half size heavy, but it's more like 1/3 heavy so it loads a medium-fast rod perfectly without overloading. I keep a few different lines spooled up for particular situations, but this line is on the main spool for every reel I have from 4wt to 9wt. 9wt is hard to find too. This is one of the few places I've found it in stock.
    Verified Buyer
    Great fly line
    Aaron (PA) | April 8th, 2021
    This is another great line from SA. I used it to replace my GPX taper. I use it for steelhead and have been very happy.
    Verified Buyer
    Great line
    Mac (Wisconsin) | March 22nd, 2021
    Really versatile line that can be used for almost any species.
    Verified Buyer
    Great line for fast action rods
    Chad (NJ) | March 18th, 2021
    Great all around line for any fast to medium-fast rods. Used on multiple setups, dries, double nymph rigs, dry droppers, it does it all. Line on one of my reels is 4yr old now, still feels and casts great.
    Verified Buyer
    Great, Yet Untested
    MVK (NY) | March 8th, 2021
    Use it for my euro nymphing set up, slings dries well and loads rod well. Would love to see more though.

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