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Questions & Answers
The rem 700 long action - does it fit 3.850 mags ? Manufacturer Answer

The UD7 chassis are configured for standard long action (3.715") CIP mags will not function with this model.

by Ultradyne USA, Manufacturer, March 18, 2026
Will this model fit Ruger American gen 1 6.5 Manufacturer Answer

Hi Jordan. Yes, our model fit for the 'Ruger American Rifle' will work perfectly for your Gen 1 chambered in 6.5.

by Ultradyne USA, Manufacturer, January 19, 2026
Customer Reviews
Helpful Positive Review
Ultradyne UD7 by Butch, Verified Owner, March 2, 2025
Better than expected! Sold on the Arca rail! Glad I went with the UD7 vs the UD5, perfect length for my 24in barrel.
2/2 found this helpful
Most Recent Reviews
Best for price by Gmd, Verified Owner, October 25, 2025
I took a chance and paid the $$ for this stock and it was worth the price. So far I have used the magpul mags that work great. The factory REM actions screws won’t fit, being too long. You are better off using hex head bolts (1/4x28) got mine from Ac...
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Read All 2 Reviews
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made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Ultradyne UD7 Chassis

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 1.5 pounds, depending on the model. 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.image

Specifications for Ultradyne UD7 Chassis:

Manufacturer: Ultradyne
Finish: Cerakote
Hand: Right
Gun Rail: M-LOK
Condition: New

Features of Ultradyne UD7 Chassis

  • Butt stock Interface: Mil Spec
  • Grip Interface: Mil Spec A2
  • Magazine Interface: AICS. 1.35 Max. Barrel Diameter.
  • Forend: Integrated ARCA Rail and MLOK Slots

Package Contents:

  • Ultradyne UD7 Chassis

Ultradyne UD7 Chassis Orderable Models

List of Orderable Models

  • Ultradyne UD7 Chassis, Rem 700 SA, Right Hand, Midnight Bronze, UD20002-MB , MPN: UD20002-MB , UPC: 810140660046 , Code: 3HE-RS0-U7URC-UD20002-MB
  • Ultradyne UD7 Chassis, Rem 700 SA, RH, Coyote Tan, UD20002-CT , MPN: UD20002-CT , UPC: 850043428633 , Code: 3HE-RS0-U7URC-UD20002-CT
  • Ultradyne UD7 Chassis, Rem 700 LA, RH, Armor Black, UD20003-AB , MPN: UD20003-AB , UPC: 850011462652 , Code: 3HE-RS0-U7URC-UD20003-AB
  • Ultradyne UD7 Chassis, Rem 700 SA, RH, Sniper Grey, UD20002-SG , MPN: UD20002-SG , UPC: 850043428640 , Code: 3HE-RS0-U7URC-UD20002-SG
  • Ultradyne UD7 Chassis, Rem 700 LA, Right Hand, OD Green, UD20003-OG , MPN: UD20003-OG , UPC: 810140660701 , Code: 3HE-RS0-U7URC-UD20003-OG
  • Ultradyne UD7 Rifles Chassis, Remington 700, 7 Slot, Long Action, Right Hand, Black, UD20003 , MPN: UD20003 , UPC: 810140660633 , Code: 3HE-RS0-U7URC-UD20003
  • Ultradyne UD7 Rifles Chassis, Remington 700, 7 Slot, Short Action, Right Hand, Black, UD20002 , MPN: UD20002 , UPC: 810140660039 , Code: 3HE-RS0-U7URC-UD20002
  • Ultradyne UD7 Chassis, Rem 700 LA, Right Hand, Midnight Bronze, UD20003-MB , MPN: UD20003-MB , UPC: 810140660640 , Code: 3HE-RS0-U7URC-UD20003-MB
  • Ultradyne UD7 Chassis, Rem 700 LA, RH, Coyote Tan, UD20003-CT , MPN: UD20003-CT , UPC: 850043428671 , Code: 3HE-RS0-U7URC-UD20003-CT
  • Ultradyne UD7 Chassis, Rem 700 SA, Right Hand, OD Green, UD20002-OG , MPN: UD20002-OG , UPC: 810140660107 , Code: 3HE-RS0-U7URC-UD20002-OG
  • Ultradyne UD7 Chassis, Ruger American SA, RH, Sniper Grey, UD20135-SG , MPN: UD20135-SG , UPC: 810140663382 , Code: 3HE-RS0-U7URC-UD20135-SG
  • Ultradyne UD7 Chassis, Ruger American SA, RH, OD Green, UD20135-OG , MPN: UD20135-OG , UPC: 810140663399 , Code: 3HE-RS0-U7URC-UD20135-OG
  • Ultradyne UD7 Chassis, Rem 700 LA, RH, Sniper Grey, UD20003-SG , MPN: UD20003-SG , UPC: 850043428688 , Code: 3HE-RS0-U7URC-UD20003-SG
  • Ultradyne UD7 Chassis, Rem 700 SA, RH, Armor Black, UD20002-AB , MPN: UD20002-AB , UPC: 850011462591 , Code: 3HE-RS0-U7URC-UD20002-AB
  • Ultradyne UD7 Chassis, Ruger American SA, RH, Midnight Bronze, UD20135-MB , MPN: UD20135-MB , UPC: 810140663375 , Code: 3HE-RS0-U7URC-UD20135-MB
  • Ultradyne UD7 Chassis, Ruger American SA, RH, Armor Black, UD20135-AB , MPN: UD20135-AB , UPC: 810140663627 , Code: 3HE-RS0-U7URC-UD20135-AB
  • Ultradyne UD7 Chassis, Ruger American SA, RH, Coyote Tan, UD20135-CT , MPN: UD20135-CT , UPC: 810140663405 , Code: 3HE-RS0-U7URC-UD20135-CT

Ultradyne UD7 Chassis Unavailable & Discontinued Models

List of Unorderable Models

  • DEMO, Ultradyne UD7 Rifles Chassis, Remington 700, 7 Slot, Long Action, Right Hand, Black, UD20003 , MPN: UD20003-DEMO , Code: 3HE-RS0-U7URC-UD20003-DEMO
  • Ultradyne UD7 Chassis, CZ 457, RH, Black Anodized, UD20132 , MPN: UD20132 , UPC: 810140663146 , Code: 3HE-RS0-U7URC-UD20132
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Anodized, UD20090 , MPN: UD20090 , UPC: 810140661173 , Code: 3HE-RS0-U7URC-UD20090
  • Ultradyne UD7 Rifles Chassis, Remington 700, 7 Slot, Short Action, Left Hand, Black, UD20086 , MPN: UD20086 , UPC: 810140660114 , Code: 3HE-RS0-U7URC-UD20086
  • Ultradyne UD7 Rifles Chassis, Remington 700, 7 Slot, Long Action, Left Hand, Black, UD20087 , MPN: UD20087 , UPC: 810140660718 , Code: 3HE-RS0-U7URC-UD20087
  • Ultradyne UD7 Chassis, Ruger American SA, RH, Black Anodized, UD20135 , MPN: UD20135 , UPC: 810140663368 , Code: 3HE-RS0-U7URC-UD20135
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Sniper Grey, UD20090-SG , MPN: UD20090-SG , UPC: 810140661210 , Code: 3HE-RS0-U7URC-UD20090-SG
  • Ultradyne UD7 Chassis, Tikka T3 SA, RH, Black Anodized, UD20124 , MPN: UD20124 , UPC: 810140662347 , Code: 3HE-RS0-U7URC-UD20124
  • Ultradyne UD7 Chassis, Howa 1500 SA, RH, Black Anodized, UD20127 , MPN: UD20127 , UPC: 810140662675 , Code: 3HE-RS0-U7URC-UD20127
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Anodized, UD20092 , MPN: UD20092 , UPC: 810140661289 , Code: 3HE-RS0-U7URC-UD20092
  • Ultradyne UD7 Chassis, CZ 457, RH, Armor Black, UD20132-AB , MPN: UD20132-AB , UPC: 810140663153 , Code: 3HE-RS0-U7URC-UD20132-AB
  • Ultradyne UD7 Chassis, Howa 1500 SA, RH, OD Green, UD20127-OG , MPN: UD20127-OG , UPC: 810140662767 , Code: 3HE-RS0-U7URC-UD20127-OG
  • Ultradyne UD7 Chassis, Tikka T3 SA, RH, Midnight Bronze, UD20124-MB , MPN: UD20124-MB , UPC: 810140662361 , Code: 3HE-RS0-U7URC-UD20124-MB
  • Ultradyne UD7 Chassis, CZ 457, RH, Midnight Bronze, UD20132-MB , MPN: UD20132-MB , UPC: 810140663160 , Code: 3HE-RS0-U7URC-UD20132-MB
  • Ultradyne UD7 Chassis, CZ 457, RH, Coyote Tan, UD20132-CT , MPN: UD20132-CT , UPC: 810140663245 , Code: 3HE-RS0-U7URC-UD20132-CT
  • Ultradyne UD7 Chassis, CZ 457, RH, OD Green, UD20132-OG , MPN: UD20132-OG , UPC: 810140663238 , Code: 3HE-RS0-U7URC-UD20132-OG
  • Ultradyne UD7 Chassis, CZ 457, RH, Sniper Grey, UD20132-SG , MPN: UD20132-SG , UPC: 810140663184 , Code: 3HE-RS0-U7URC-UD20132-SG
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Midnight Bronze, UD20090-MB , MPN: UD20090-MB , UPC: 810140661197 , Code: 3HE-RS0-U7URC-UD20090-MB
  • Ultradyne UD7 Chassis, Howa 1500 SA, RH, Midnight Bronze, UD20127-MB , MPN: UD20127-MB , UPC: 810140662699 , Code: 3HE-RS0-U7URC-UD20127-MB
  • Ultradyne UD7 Chassis, Howa 1500 SA, RH, Sniper Grey, UD20127-SG , MPN: UD20127-SG , UPC: 810140662712 , Code: 3HE-RS0-U7URC-UD20127-SG
  • Ultradyne UD7 Chassis, Howa 1500 SA, RH, Coyote Tan, UD20127-CT , MPN: UD20127-CT , UPC: 810140662774 , Code: 3HE-RS0-U7URC-UD20127-CT
  • Ultradyne UD7 Chassis, Rem 700 LA, LH, Sniper Grey, UD20087-SG , MPN: UD20087-SG , UPC: 850043428701 , Code: 3HE-RS0-U7URC-UD20087-SG
  • Ultradyne UD7 Chassis, Rem 700 LA, LH, Coyote Tan, UD20087-CT , MPN: UD20087-CT , UPC: 850043428695 , Code: 3HE-RS0-U7URC-UD20087-CT
  • Ultradyne UD7 Chassis, Tikka T3 SA, RH, Sniper Grey, UD20124-SG , MPN: UD20124-SG , UPC: 810140662385 , Code: 3HE-RS0-U7URC-UD20124-SG
  • Ultradyne UD7 Chassis, Howa 1500 SA, RH, Armor Black, UD20127-AB , MPN: UD20127-AB , UPC: 810140662682 , Code: 3HE-RS0-U7URC-UD20127-AB
  • Ultradyne UD7 Chassis, Tikka T3 SA, RH, OD Green, UD20124-OG , MPN: UD20124-OG , UPC: 810140662439 , Code: 3HE-RS0-U7URC-UD20124-OG
  • Ultradyne UD7 Chassis, Rem 700 SA, LH, Coyote Tan, UD20086-CT , MPN: UD20086-CT , UPC: 850043428657 , Code: 3HE-RS0-U7URC-UD20086-CT
  • Ultradyne UD7 Chassis, Rem 700 SA, LH, Sniper Grey, UD20086-SG , MPN: UD20086-SG , UPC: 850043428664 , Code: 3HE-RS0-U7URC-UD20086-SG
  • Ultradyne UD7 Chassis, Rem 700 SA, LH, Armor Black, UD20086-AB , MPN: UD20086-AB , UPC: 850043428497 , Code: 3HE-RS0-U7URC-UD20086-AB
  • Ultradyne UD7 Chassis, Tikka T3 SA, RH, Armor Black, UD20124-AB , MPN: UD20124-AB , UPC: 810140662354 , Code: 3HE-RS0-U7URC-UD20124-AB
  • Ultradyne UD7 Chassis, Rem 700 LA, LH, Armor Black, UD20087-AB , MPN: UD20087-AB , UPC: 850043428503 , Code: 3HE-RS0-U7URC-UD20087-AB
  • Ultradyne UD7 Chassis, Tikka T3 SA, RH, Coyote Tan, UD20124-CT , MPN: UD20124-CT , UPC: 810140662446 , Code: 3HE-RS0-U7URC-UD20124-CT
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Coyote Tan, UD20090-CT , MPN: UD20090-CT , UPC: 810140661272 , Code: 3HE-RS0-U7URC-UD20090-CT
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, OD Green, UD20092-OG , MPN: UD20092-OG , UPC: 810140661371 , Code: 3HE-RS0-U7URC-UD20092-OG
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Midnight Bronze, UD20092-MB , MPN: UD20092-MB , UPC: 810140661302 , Code: 3HE-RS0-U7URC-UD20092-MB
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Armor Black, UD20092-AB , MPN: UD20092-AB , UPC: 810140661296 , Code: 3HE-RS0-U7URC-UD20092-AB
  • Ultradyne UD7 Chassis, Rem 700 SA, Left Hand, Midnight Bronze, UD20086-MB , MPN: UD20086-MB , UPC: 810140660121 , Code: 3HE-RS0-U7URC-UD20086-MB
  • Ultradyne UD7 Chassis, Rem 700 SA, Left Hand, OD Green, UD20086-OG , MPN: UD20086-OG , UPC: 810140660183 , Code: 3HE-RS0-U7URC-UD20086-OG
  • Ultradyne UD7 Chassis, Rem 700 LA, Left Hand, OD Green, UD20087-OG , MPN: UD20087-OG , UPC: 810140660787 , Code: 3HE-RS0-U7URC-UD20087-OG
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, OD Green, UD20090-OG , MPN: UD20090-OG , UPC: 810140661265 , Code: 3HE-RS0-U7URC-UD20090-OG
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Coyote Tan, UD20092-CT , MPN: UD20092-CT , UPC: 810140661388 , Code: 3HE-RS0-U7URC-UD20092-CT
  • Ultradyne UD7 Chassis, Rem 700 LA, Left Hand, Midnight Bronze, UD20087-MB , MPN: UD20087-MB , UPC: 810140660725 , Code: 3HE-RS0-U7URC-UD20087-MB
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Sniper Grey, UD20092-SG , MPN: UD20092-SG , UPC: 810140661326 , Code: 3HE-RS0-U7URC-UD20092-SG
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Armor Black, UD20090-AB , MPN: UD20090-AB , UPC: 810140661180 , Code: 3HE-RS0-U7URC-UD20090-AB
  • Ultradyne UD7 Chassis, Rem 700 LA, Left Hand, Tequila Sunrise, UD20087-TS , MPN: UD20087-TS , UPC: 810140660763 , Code: 3HE-RS0-U7URC-UD20087-TS
  • Ultradyne UD7 Chassis, Rem 700 SA, Left Hand, Habanero Red, UD20086-HR , MPN: UD20086-HR , UPC: 810140660152 , Code: 3HE-RS0-U7URC-UD20086-HR
  • Ultradyne UD7 Chassis, Rem 700 SA, Right Hand, Tequila Sunrise, UD20002-TS , MPN: UD20002-TS , UPC: 810140660084 , Code: 3HE-RS0-U7URC-UD20002-TS
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Tequila Sunrise, UD20092-TS , MPN: UD20092-TS , UPC: 810140661357 , Code: 3HE-RS0-U7URC-UD20092-TS
  • Ultradyne UD7 Chassis, Rem 700 LA, Right Hand, Tungsten, UD20003-TU , MPN: UD20003-TU , UPC: 810140660657 , Code: 3HE-RS0-U7URC-UD20003-TU
  • Ultradyne UD7 Chassis, Rem 700 LA, Right Hand, Habanero Red, UD20003-HR , MPN: UD20003-HR , UPC: 810140660671 , Code: 3HE-RS0-U7URC-UD20003-HR
  • Ultradyne UD7 Chassis, Rem 700 SA, Left Hand, Titanium, UD20086-TI , MPN: UD20086-TI , UPC: 810140660176 , Code: 3HE-RS0-U7URC-UD20086-TI
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Northern Lights, UD20090-NL , MPN: UD20090-NL , UPC: 810140661227 , Code: 3HE-RS0-U7URC-UD20090-NL
  • Ultradyne UD7 Chassis, Rem 700 LA, Right Hand, Titanium, UD20003-TI , MPN: UD20003-TI , UPC: 810140660695 , Code: 3HE-RS0-U7URC-UD20003-TI
  • Ultradyne UD7 Chassis, Rem 700 LA, Left Hand, Habanero Red, UD20087-HR , MPN: UD20087-HR , UPC: 810140660756 , Code: 3HE-RS0-U7URC-UD20087-HR
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Tungsten, UD20090-TU , MPN: UD20090-TU , UPC: 810140661203 , Code: 3HE-RS0-U7URC-UD20090-TU
  • Ultradyne UD7 Chassis, Rem 700 SA, Left Hand, Northern Lights, UD20086-NL , MPN: UD20086-NL , UPC: 810140660145 , Code: 3HE-RS0-U7URC-UD20086-NL
  • Ultradyne UD7 Chassis, Rem 700 SA, Right Hand, Habanero Red, UD20002-HR , MPN: UD20002-HR , UPC: 810140660077 , Code: 3HE-RS0-U7URC-UD20002-HR
  • Ultradyne UD7 Chassis, Rem 700 LA, Left Hand, Northern Lights, UD20087-NL , MPN: UD20087-NL , UPC: 810140660749 , Code: 3HE-RS0-U7URC-UD20087-NL
  • Ultradyne UD7 Chassis, Rem 700 LA, Right Hand, Northern Lights, UD20003-NL , MPN: UD20003-NL , UPC: 810140660664 , Code: 3HE-RS0-U7URC-UD20003-NL
  • Ultradyne UD7 Chassis, Rem 700 SA, Right Hand, Northern Lights, UD20002-NL , MPN: UD20002-NL , UPC: 810140660060 , Code: 3HE-RS0-U7URC-UD20002-NL
  • Ultradyne UD7 Chassis, Rem 700 LA, Left Hand, Titanium, UD20087-TI , MPN: UD20087-TI , UPC: 810140660770 , Code: 3HE-RS0-U7URC-UD20087-TI
  • Ultradyne UD7 Chassis, Rem 700 SA, Left Hand, Tungsten, UD20086-TU , MPN: UD20086-TU , UPC: 810140660138 , Code: 3HE-RS0-U7URC-UD20086-TU
  • Ultradyne UD7 Chassis, Rem 700 LA, Right Hand, Tequila Sunrise, UD20003-TS , MPN: UD20003-TS , UPC: 810140660688 , Code: 3HE-RS0-U7URC-UD20003-TS
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Northern Lights, UD20092-NL , MPN: UD20092-NL , UPC: 810140661333 , Code: 3HE-RS0-U7URC-UD20092-NL
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Habanero Red, UD20090-HR , MPN: UD20090-HR , UPC: 810140661234 , Code: 3HE-RS0-U7URC-UD20090-HR
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Tequila Sunrise, UD20090-TS , MPN: UD20090-TS , UPC: 810140661241 , Code: 3HE-RS0-U7URC-UD20090-TS
  • Ultradyne UD7 Chassis, Savage SA, Right Hand, Titanium, UD20090-TI , MPN: UD20090-TI , UPC: 810140661258 , Code: 3HE-RS0-U7URC-UD20090-TI
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Titanium, UD20092-TI , MPN: UD20092-TI , UPC: 810140661364 , Code: 3HE-RS0-U7URC-UD20092-TI
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Tungsten, UD20092-TU , MPN: UD20092-TU , UPC: 810140661319 , Code: 3HE-RS0-U7URC-UD20092-TU
  • Ultradyne UD7 Chassis, Rem 700 SA, Left Hand, Tequila Sunrise, UD20086-TS , MPN: UD20086-TS , UPC: 810140660169 , Code: 3HE-RS0-U7URC-UD20086-TS
  • Ultradyne UD7 Chassis, Savage SA, Left Hand, Habanero Red, UD20092-HR , MPN: UD20092-HR , UPC: 810140661340 , Code: 3HE-RS0-U7URC-UD20092-HR
  • Ultradyne UD7 Chassis, Rem 700 SA, Right Hand, Tungsten, UD20002-TU , MPN: UD20002-TU , UPC: 810140660053 , Code: 3HE-RS0-U7URC-UD20002-TU
  • Ultradyne UD7 Chassis, Rem 700 SA, Right Hand, Titanium, UD20002-TI , MPN: UD20002-TI , UPC: 810140660091 , Code: 3HE-RS0-U7URC-UD20002-TI
  • Ultradyne UD7 Chassis, Rem 700 LA, Left Hand, Tungsten, UD20087-TU , MPN: UD20087-TU , UPC: 810140660732 , Code: 3HE-RS0-U7URC-UD20087-TU
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