Limited Time Deal
Convert your standard AR-15 into a 5.7×28 PDW-style platform with the Panzer AR57 ULT Upper Assembly—now heavily discounted. Normally $899.99, this innovative upper is available for just $599.99, making it one of the most affordable ways to run FN P90-compatible 5.7×28 magazines on your existing AR lower.
Top Features
- Convert Any AR-15 Lower to 5.7×28 – Drop-in upper lets you shoot the same cartridge used by the legendary FN P90.
- Top-Mounted 50-Round Magazine – Feeds from the top and ejects spent brass downward through the magwell.
- 12″ Lightweight Barrel with M-LOK Rail – Compact setup ideal for PDW-style builds.
- Aircraft-Grade 7075-T6 “Kryptonite Monobloc” Receiver – Precision machined and rated for extreme strength.
- Melonite-Treated Components – Durable corrosion-resistant finish for long service life.
Why Shooters Love It
The Panzer AR57 ULT Upper is one of the most unique AR-15 conversions available today. Instead of using traditional AR magazines, it feeds from 50-round P90-style mags, giving shooters massive capacity while running the lightweight, low-recoil 5.7×28 cartridge. With no gas system to foul and a simple blowback design, it’s extremely reliable and easy to maintain.
For AR enthusiasts looking to build a compact PDW-style rifle or pistol, this upper delivers a fun, fast-shooting platform that stands out from the typical 5.56 build.
Customer Testimonials
⭐ I have a buddy that has the FN 57 pistol! I love the compact hard hitting design of this cartridge! I bought the 16″ version! I added simple flip up sights on it to go range & zero! I & 1 of my 2 sons is left-handed! Top feedi g ejectong through AR lower mag well is a great idea! All three of us shot it hitting same bullet holes at about 60′ standing! Is a great q to own! I did find loading new mags very hard! But, once we ran 150 rounds through 2, it got easier! Bullets shouldn’t cost so much more than 5.56mm, it’s a 28mm!
⭐ Absolutely one of the best uppers I’ve ever bought from PSA and have enjoyed every chance I’ve gotten to shoot it. By far one of the best rounds that you can hand over to anyone with basic shooter safety knowledge and walk them through on how to install, chamber, rack the first round, and have at it. Maybe a little expensive to shoot but when buying in bulk it’s a little better. One happy customer. Buckeye Sports Shooter
⭐ Is it better than a 5. 56? No. Is it another level of cool at the range? Hell yeah.
Unbeatable Price
- MSRP:
$899.99 - Current Price: $599.99
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