MDT TAC 21 Chassis System

Looking for a stock replacement for your Remington 700, Savage or Tikka T3 Bolt action rifle, turning it into a tactical and highly accurate system? Our TAC21 Gen2 Chassis system for bolt action rifles offers a combination of improved accuracy, superior ergonomics and specialized design allowing use of AR-15 butt-stocks, grips and automatically converts your rifle to an external box magazine fed rifle.

The TAC21 Gen2 can be installed in 30 - 45 minutes without the need of bedding and has proven results with up to 28% accuracy improvements.

Please note: Some action inlets, left handed models & colours will be special order and have extended delivery times.

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Product Description

Our TAC21™ Gen2 chassis system is a combination of benchrest accuracy, superior ergonomics and specialized design. This chassis brings the bolt action rifles to the next level in versatility and modularity, with an instant improvement in accuracy.

The chassis system is manufactured out of billet 6061-T6 aluminum, which has been finished with Cerakote™ in Black or Flat Dark Earth (FDE).

TAC21™ Gen2 chassis is engineered to minimize warping and distortion. The rifle receiver only makes contact with the TAC21™ Gen2 chassis on the V shape bedding and recoil lug area insuring the best accuracy and repeatability. The generous clearance on the forend makes any barrel (diameter up to the receiver size – 1.350”) free floating.

Inherently, the TAC21™ Gen2 has a straight-line design, meaning that the recoil comes straight back instead of making the front of the rifle kick upwards. This results in more accurate and quicker follow up shots. This also translates to a decrease in felt recoil and increase in comfort.


  • Increases accuracy by up to 28%
  • CNC Machined from 6061 aluminum
  • Cerakote Finish in Black or Flat Dark Earth
  • 20 MOA built in top rail
  • The action housing has 2 threaded holes on the opposite side of the bolt handle for attaching a Magpul or MDT L3 bolt-on rail
  • Lightweight, free-floating modular forend, M-LOK compatible
  • Will accommodate barrels as thick as the action
  • Compatible with AICS style magazines in .223 or .308 (SA) and 300WM, 30.06, 338LM (LA). (Long Action Magazine length 3.715)
  • Weight: 3lb - 3.6lb


The TAC21™ Gen2 chassis system is currently manufactured for the following bolt action rifle platforms:

  • Remington 700 Short Action (.223 and .308 bolt faces)
  • Remington 700 Long Action (.300WM, .338LM, 7mm RM, 30.06)
  • Savage Short Action, Models 10, 11, 12 and 16 (.223 and .308 bolt faces)
  • Savage Long Action, Models 110, 111, 112 and 116 (.300WM)
  • Tikka T3 - Short Calibers (.223 and .308 bolt faces)
  • Tikka T3 - Long Calibers (.300WM, 6.5x55, 7mm RM, 30.06). Requires MDT 3.560 Magazine.

Please note: For Savage Long Action in 338 Lapua Magnum: Savage Long Action Chassis Systems all use 3.715" AICS magazine wells. The model 110BA in 338 Lapua Magnum uses 3.850" magazines and have recently switched to a thicker recoil lug which will not fit our TAC21 Gen2 chassis. We do however have our ESS Chassis available for this model.


The TAC21 Gen2 chassis system comes as a 4-piece chassis, with all required mounting hardware included. This includes new action screws, and a screw for the pistol grip.

To complete this chassis on your rifle, the additional items you need to purchase are:

  • An AR-15 Pistol Grip
  • At least one magazine

For a lighter, more compact chassis, please also see our LSS, LSS-XL and XRS Chassis Systems.


A delivery cost will be added to your order at checkout and is relevant for standard delivery to England, (parts of) Scotland and Wales (excluding Channel Islands) at £6.95 for 2-3 day delivery. 

PLEASE NOTE: All items deemded as a 'Firearms' or over the standard delivery weight limit (Gun Safes) may have extra charges for delivery. You must enter an RFD (registered firearms dealer) address at the checkout for all firearms orders that are not being collected in store.

Delivery costs to the Highlands and Islands are detailed at the checkout.

Please see full information here


As detailed in our Terms and Conditions you may cancel your order at any time up to the end of the seventh (7th) day from the date you received the goods. Unless the Goods are faulty (verified by us) or obviously not the goods originally ordered we reserve the right to reclaim all costs incurred by us in recovering them from you and may set such costs off against the amount to be re-credited to your debit or credit card. See more info here

Note: Currently not available for delivery to Ireland, Europe, North America, Australia and New Zealand and R.O.W..

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