UD Chassis

(6 customer reviews)


Standard:   Black Anodized Cerakote® Color Options:   + 100USD


The Ultradyne Chassis is crafted from a solid bar of 6061 T6 Aircraft Aluminum for exceptional strength and durability. The one-piece design weighs between 1.1 and 1.3 pounds, depending on the model. This makes it suitable for both hunting rifles that weigh as little as 6 pounds and long range target rifles that weigh up to 16 pounds. When paired with the Ultradyne Adjustable Butt Stock, it is lighter than most factory stocks yet has the ability to add up to 5 pounds with optional weights.

The Ultradyne Chassis is packed with features including an adjustable magazine release lever, compatibility with AICS magazines, ability to work with any Mil-Spec butt stock, a built-in Arca rail, M-LOK slots on three sides, and Dynalock technology to ensure a secure fit. The action is held in place with V-channel bedding that can accommodate free-floated barrels up to 1.35 inches in diameter.

Please note Chassis compatibilities under the compatibility tab.

DISCLAIMER: Please allow up to 5 business days for Cerakote®’d products before shipment


  • 6061 T6 Aluminum
  • Cerakote® Finish
  • Stock Interface: Mil Spec
  • Grip Interface: Mil Spec A2
  • Magazine Interface: AICS
  • 1.35” Max. Barrel Diameter
  • 17 oz
  • 15.3” Overall Length, 6.5" Forend Length, 4.2” Arca Length
  • 8 M-LOK Slots
  • 19 oz
  • 18.5” Overall Length, 9.5" Forend Length, 7.7” Arca Length
  • 14 M-LOK Slots
UD7 Short Action
  • 21 oz
  • 21.6” Overall Length, 12.5" Forend Length, 10.8” Arca Length
  • 20 M-LOK Slots
UD7 Long Action
  • 25 oz
  • 22” Overall Length, 12.5" Forend Length, 10.8” Arca Length
  • 20 M-LOK Slots


3 Slot (15.3") 5 Slot (18.5") 7 Slot (21.6")
Rem 700 SA - RH Available Available Available
Rem 700 SA - LH Available Available Available
Rem 700 SA (300 WSM/6.5 PRC) RH Available Available Available
Rem 700 SA (300 WSM/6.5 PRC) LH Available Available Available
Vudoo RH Available Available Available
Vudoo LH Available Available Available
Aero Precision SOLUS Available 6-8 Weeks 6-8 Weeks
Rem 700 LA - RH 12 Weeks 6-8 Weeks Available
Rem 700 LA - LH 12 Weeks 6-8 Weeks 6-8 Weeks
Savage SA - RH Available Available Available
Savage SA - LH Call for Availability Call for Availability Call for Availability


  • Rem 700 SA
  • Rem 700 SA Clones (Bergara B14, Curtis Custom, Zermatt Origin) *Please contact us regarding other clone compatibilities 
  • Rem 700 LA
  • Savage SA (10, 11, 12, 14, 16, 110)
  • V22
  • Solus (Coming Soon)

6 reviews for UD Chassis

  1. Tommylee (verified owner)

    Just got my chassis tonight, and its freakin awsome. I was skeptical of the quality becouse of the low price, but damn. This thing is beautiful, the machining is excellent, no blemishes, the anodizing is perfect, not gloss, not matte just a perfect satin black. Im super excited about my ultradyne chassis, and very glad i didnt go with the rival arms one over the ultradyne chassis. The built in arca rail was the seller for me. Thank you guys for such a quality product at 2/3rds the price of your competitors.

  2. Howard Gillingham (verified owner)

    For a low-end chassis, my UD5 is highly impressive. It now has a side-mount bipod, pistol grip and 4-way adjustable buttstock. Anxiously awaiting my Savage 6.5 to come back from my Cerakoter, and range day. I’m about to order a UD bridge for for it also. This UD5 is an OUTSTANDING piece of equipment for anywhere near the money!

  3. Will (verified owner)

    Awesome Chassis. I own an MDT LSS Chassis. It is very similar and somewhere between the 3 and 4 slot UD Chassis. I can say the Chassis are very similar, but the Ultradyne exceeds it in multiple way. Better price, more color options and it comes with useful features like Arca rail and the ability to add adapters to the end. If you are considering the MDT LSS or LSS-XL this chassis beats them hands down. Machining and cerakote is perfect, its less expensive and it weighs less.

    Only thing I can see that needs improvement is adding more actions like the Remington 783, Howa 1500, and Howa Mini.

    Also, A folding stock adapter would be an awesome addition.

  4. Joe Starns (verified owner)

    I bought the UD5 and a spigot and it is perfect. Not super long but the spigot gets the bipod right where I want it.
    Overall quality, fit and finish are amazing. Anyone on the fence about one of these chassis don’t be. You will not go wrong with Ultradyne products.

    Joe S.

  5. Dj (verified owner)

    Very well made chassis. Very lightweight for what you get. Have it on a Vudoo rimfire and works well.

  6. Mark Weimer

    I have just started working on my build and was wanting to do something with the .300 Winchester Short Magnum (WSM). I had a question about compatibility, so I called, and they were extremely helpful and knowledgeable.
    The fit and finish of the chassis, light-weight butt stock, and the grip seem to be outstanding. I am very impressed by the build quality and weight (or lack thereof). My only concern is with the recoil pad. It seems a bit stiff and knowing that the .300 WSM packs a punch, it may be inadequate. Time will tell. I DO like the other accessory options available and will likely be purchasing a few of those to make this thing perfect.

Add a review

Your email address will not be published. Required fields are marked *