Product Info for MDT LSS Chassis System for Remington 783

Our LSS chassis system was designed to be as compact as possible. The V-shaped bedding and free floated forend improve accuracy and ergonomics. The forend allows for barrel contours up to 1" in diameter.

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

To keep this chassis system compact, it was designed for carbine AR-15 buttstocks. However, fixed buttstocks can be mounted with the use of a fixed stock adapter.

Alternatively, our LSS-XL chassis has a longer forend and was designed to accept fixed buttstocks without the use of the adapter.

MOUNTING AND COMPATIBLE ACCESSORIES

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

The LSS chassis uses AICS style external box style magazines in .223 and .308 caliber for Short Action and .300WM or .338LM AICS style magazines for Long Action rifles, and supports the installation of bolt-on MIL-STN-1913 accessory mounting rails. Mounting holes are spaced for Magpul style L5 (11 slots) and L3 (7 slots) rails (1.600/3.200) to be used on the bottom of the forend up to 6.5" in length.

Note: Long action magazines come in 4 different lengths: 3.560", 3.715", 3.775" and 3.850". The LSS chassis for long action uses 3.715 length magazines with the exception of the Tikka T3 which needs the 3.560" length magazines.

The max thickness of recoil lug recommend is .350" (8.9mm)

SPECIFICATIONS

Increases accuracy by up to 21%

CNC Machined from 6061 aluminum

Cerakote Finish in Black or Flat Dark Earth

Hole spacing for Magpul L5(11slot) and L3(7slot)Rails

Designed for carbine AR-15 buttstocks

Accepts most AR-15 Pistol Grips

Lightweight, free-floating modular forend

Will accommodate barrels up to 1" diameter.

Compatible with AICS style magazines in .223 or .308 (SA) and 300WM, 30.06, (LA). (Long Action Magazine length 3.715)

Weight: 1.6lb - 1.8lb

For rifles with longer barrels to be used for long range (past 900 meters) we recommend our TAC21, ESS or our HS3 Chassis systems.

WHAT YOU GET, AND WHAT YOU NEED

The LSS chassis system comes as a 1-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. For fixed buttstocks, you will need the fixed stock adapter, or consider using our LSS-XL chassis.

A buffer tube for your buttstock. (Both mil-spec and commercial work on our chassis)

An AR-15 Pistol Grip. Ideally without a beavertail, or use a soft (bendable) beavertail.

At least one magazine

If you prefer a longer forend, please also see our LSS-XL chassis System or our HS3 Chassis System.

IMPORTANT NOTES

Howa 1500/Weatherby Vanguard Short Actions

This is the only action that we manufacture a chassis for that has a flat bottom action. For this reason, only our Polymer magazines will work. The fitting may need to be modified slightly for proper feeding.

For .223 models the bolt stop may be too long. This can easily be modified.

This also means that the action does not sit in a V-Block.

Savage models 10/110 11/111 12/112 16/116

For rifles with the bolt release at the bottom, the bolt release can be engaged through the side of the chassis, using a pin or tool. (Not included)

Savage Long Action in 338 Lapua Magnum

Savage Long Action Chassis systems all use 3.715" AICS magazine wells. The BA 110 in 338 Lapua Magnum uses 3.850" magazines and have recently switched to a thicker recoil lug which will not fit our chassis. We have released a version of the ESS which is specifically designed around the current BA 110 in 338 Lapua Magnum.

Tikka T3/T3x - Long Calibers

Only our Metal 3.56 magazine will fit with the chassis for this action and needs to be purchased separately.

Savage Axis

The original recoil lug that comes with the rifle is required for installation into the chassis. On the Long Action, you will need to use 30.06 3.56 Magazine

Ruger American

The action screw is located directly above the magazine lever. This means that the magazine lever needs to be installed AFTER installing the action into the chassis. Detailed instructions are provided, and an installation video can be found here.

Ruger American in 223/5.56mm requires the use of this magazine