MDT TAC21 Chassis System FDE

MDT TAC 21 Remington 700 Chassis System Details

The MDT TAC21 chassis system 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 hard anodized to mil spec type III for extra strenth, and has been finished with Cerakote™ in Black or Flat Dark Earth (FDE).

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

Inherently the TAC21™ has a straightline 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 comfort.

Remington 700 MDT TAC 21 Chassis System Compatibility

The TAC21™ 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, 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 and .338LM)
  • Tikka T3 – Short Calibers (.223 and .308 bolt faces)
  • Tikka T3 – Long Calibers (.300WM, 6.5×55, 7mm, 30.06). Requires MDT 3.560 Magazine.

Remington 700 MDT TAC 21 Chassis System

 Mounting and Compatible Accessories

The TAC21™ chassis is designed to accept any AR-15 butt-stock and pistol grip (purchased separately), offering the option to customize from the wide variety of  Accessories available on the market.

The TAC21™ chassis uses external box style magazines in .223 and .308 caliber for Short Action and .300WM or .338LM magazines for Long Action rifles, and supports installation of bolt on MIL-STN-1913 accessory mounting rails on the fore-end and side of the action housing. Mounting holes are spaced for Magpul style L5 (11 slots) and L3 (7 slots) rails (1.600” / 3.200”).

With a top full length MIL-STN-1913 accessories mounting rail. The built-in mounting rail has 20 MOA (Minutes of Angle) on the action housing and is parallel to the barrel axis on the fore-end.

Note: Long action magazines come in 3 different lengths: 3.715″, 3.775″ an 8.050″. Our chassis use 3.715 magazines. If you purchased the Remington 700 Tactical Chassis Rifle, the magazine well is 3.775.

Remington 700 MDT TAC 21 Chassis System Specifications

  • Increases accuracy by up to 28%
  • Construction aluminum hard anodized to mil spec type III
  • Cerakote Finish in Black or Flat Dark Earth
  • 20 MOA built in top rail
  • Hole spacing for Magpul L5(11slot) and L3(7slot)Rails
  • Lightweight, free-floating modular fore-end
  • 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

What you get, and what you need

The MDT TAC21 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:

  • Any AR-15 buttstock or our Skeleton Rifle Stock.
  • A buffer tube for your buttstock. (Both milspec and commercial work on our chassis)
  • An AR-15 Pistol Grip
  • At least one magazine


Aluminum chassis system anchors a Remington 700 barreled action in a V-shaped bedding block for a rock solid mounting that helps ensure consistent accuracy. Combines the accuracy of a benchrest rifle with the familiar ergonomics of the AR-15/M16 platform. Straight-line design directs recoil force directly to the rear, dramatically reducing muzzle rise and time to get back on target for follow-up shots. Bottom metal is configured to accept detachable box magazines, available separately. Integral Picatinny rail above the receiver provides an ultra-stable scope platform with built-in 20 MOA elevation for extended-range shooting. Accepts any AR-15 pistol grip, receiver extension tube, and buttstock to increase the rifle’s versatility by mounting a variety of popular AR-15 accessories. Free-float aluminum forend has a full-length Picatinny rail on top and mounting holes to accept Magpul® MOE® L3 and L5 accessory rails (available separately) for lights, lasers, bipods, and other tactical accessories. Available in black or flat dark earth. Short action chassis is available with two 5 or 10 round magazines.