Out of stock
Scientific Anglers

Scientific Anglers Mastery MPX Fly Line · WF · 4 wt · Floating · Buckskin - Optic Green

Curated 540 times by our Experts
160 added to cart
89 purchased
2 returned

$39.98

$79.95
50% off
Color: Buckskin / Optic Green
Line weight
7 wt
8 wt
4 wt
6 wt
3 wt
5 wt
Currently out of stock
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For years, the gold standard in the Scientific Anglers lineup was the GPX taper. From tossing small dries to slinging huge streamers, the GPX could do it all. But all good things must come to an end. Built a half-size heavy, the MPX taper starts where the GPX left off. Redesigned with more mass toward the front of the head, the MPX provides the same benefits of the GPX, with an added emphasis on presentation. The power is still there, only with an added bit of finesse. Meet your new best friend and the best all-around fly line we’ve ever made.

  • The ultimate general presentation taper
  • Improved version of our GPX taper
  • Built a half-size heavy to load rods and turn over large flies easily
  • Features AST slickness additive
  • For use in moderate and cold climates
  • SA ID – SA MS MPX WF X F (X = line weight)

ColorBuckskin / Optic Green
Fly line taperWeight forward
Line weight4 wt
Fly line typeFloating
Total length (ft)90
Head length (ft)34
Grain weight (gr)130
Line typeBraided
Water typeFreshwater
Fly fishing typeDries, Nymphs, Streamers, Indicators, Poppers/Big Dries
Fish speciesTrout, Panfish, Bass, Carp, Steelhead, Steelhead, Pike
Fishing typeFly
Head weight (gr)140
SizeWF-4-F

Free shippingFree standard shipping for most items over $50 in the lower 48 states, $125 to ship orders to Alaska and Hawaii. Expedited delivery, if available, is an additional charge available at checkout. We do not ship internationally at this time.
Easy returnsWe offer a 30-day peace of mind returns on most items in new condition that are in their original packaging. Items purchased used are not eligible to be returned. Read our return policy for more detail

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5 /5
I’m just a gal having fun learning to fly fish and ready to buy my own set up. Having minimal knowledge of what buy and loads of options out there, shopping can be a bit overwhelming. But, Johnny was so great to work with! His knowledge & attention to detail, and humor made it fun & easy figuring out a great starter set up best suited for me.
Rachel Verified CustomerSep 30, 2024
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Helped by:
Matt helped me out of the fog and the overwhelming state I was in trying to buy my first Flyfishing set up…. I would still be fishing for gear a month from now if it wasn’t for him sticking his hand out to me.
5 /5
I’ve dealt with more than a handful of folks on fb marketplace that were downright aggressive, mean, and unhelpful to me over a series of exchanges in my search for gear. Matt was everything but. He not only pointed me in the right direction but he was friendly and knowledgeable as well. I needed all the help I could get and he was there. Thanknu again Matt.
Adam B Verified CustomerFeb 25, 2024
KY, US
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Fast, knowledgeable, and very helpful.
5 /5
I'm an intermediate angler with little knowledge of equipment. Rylyn was very responsive to all my questions, even the ones I thought were stupid. Very open about what he does and how he is paid. I highly recommend him.
steve Verified CustomerApr 27, 2024
TX, US
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Really great experience
5 /5
Danny is very knowledgeable about fly fishing while still being approachable and easy going. He answers questions in a straightforward and honest way without applying any pressure to make a sale. In my case, i truly felt like he wanted me to get the best gear at the best price.
Joe Verified CustomerDec 23, 2023
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Excellent buying experience with Captain Mark.
5 /5
I bought an open box Orvis fishing rod and it was at a great price. The condition of the rod and the shipping time exceeded my expectations. The information I received from Capt. Mark was accurate and helpful. I would definitely buy from Curated again.
Ed A Verified CustomerDec 15, 2023
VA, US
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Matt was very helpful for a newbie!!
5 /5
I wanted to purchase gifts for my husband and son as they are slowly getting into fly fishing. Matt was really helpful in taking a look at what they already have and made excellent recommendations on what they need. I cannot wait to look like a superhero and see the joy on my son’s face with a big thanks to Matt!!
Kasi Verified CustomerDec 14, 2023
CT, US
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