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Precision Rifle Chassis and Stocks: How to Choose for Your Bolt Gun

Posted by D&R Sports Center on Nov 13th 2026

A factory bolt gun can be accurate, but the stock it shipped in is usually doing it no favors: a flexible forend, a length of pull built for nobody in particular, a comb too low for a scope on real rings, and a hinged floorplate you have to dump to unload. A good chassis or aftermarket stock fixes all of that. A wrong one doesn't fit your action at all. Work through these decisions in order and you will end up with something that drops in, holds zero and fits you.

1. Decide whether you need a chassis or a stock

The terms get used loosely, so here is how we use them at the counter. A chassis is built around a machined aluminum spine: the action sits on a metal bedding surface, the forend is rigid, and the buttstock and grip are usually separate, modular parts. That buys you adjustability, accessory rails and a magazine well for detachable box magazines. The trade-off is weight, cold metal in winter, and a look closer to an AR-15 than a sporting rifle.

A stock in the traditional sense is a one-piece shape, today usually polymer or composite, often with an aluminum bedding block molded inside. It carries better, feels warmer, and rides in a scabbard or on a pack the way a hunting rifle should. The newer hybrids blur the line. The MDT XRS puts a full-length 6061 aluminum core inside textured polymer panels, giving you a traditional-shaped stock with chassis bones, and MDT's Field Stock does the same with an overmolded polymer body.

The quick way to decide: if you shoot matches, off barricades or from a tripod, start with a chassis. If you hunt on foot and carry more than you shoot, start with a stock or a light hunting chassis. If you do both, one of the hybrids is probably your answer.

2. Match the inlet exactly: action, length, hand and barrel

This is where most returns come from. A chassis or stock is inlet for one action pattern, and "close" does not count. Check four things before anything else.

  • Action model. Remington 700, Tikka T3/T3x, Savage, Howa 1500, Ruger American and CZ 457 all have different receiver shapes, action screw locations and recoil lugs. The Remington 700 footprint has the widest aftermarket support and many custom actions are built to it, but confirm with the action maker that yours is truly 700-pattern for stock fit. Within Savage, the Axis is a different rifle from the 110-family actions, which is why MDT lists its Oryx chassis for Savage long action as "not Axis" and Magpul makes a separate Hunter Lite for the Savage AXIS.
  • Short or long action. Short actions cover the .308-length family (.308 Win, 6.5 Creedmoor, .243 and the like); long actions cover .30-06-length cartridges and most standard magnums. Action screw spacing and magazine well length differ, so a short-action chassis will not take a long-action rifle. Go by what your rifle is chambered in, not what it looks like.
  • Right or left hand. Many chassis are right-hand only. The Ultradyne UD6 for Remington 700 and the MDT LSS Gen 3 bases are listed that way. The Magpul Pro 700 is the exception in our range: it accepts right- and left-hand Remington 700-pattern short actions with a swappable bolt retainer plate.
  • Barrel contour. A free-float channel has a maximum width. Magpul's Hunter stocks free-float barrels up to 0.920 in, while the Ultradyne UD6 is listed for barrels up to 1.35 in. Measure your barrel where it leaves the forend. A heavy aftermarket contour that touches the channel undoes the point of free floating.

Generations matter too. Ruger has built the American in more than one configuration, and Tikka listings may say T3, T3x or both. If a listing does not name your exact rifle, ask us with your make, model and caliber before you order.

3. Choose a magazine system

Most precision chassis convert the rifle to detachable box magazines in the AICS pattern, a double-stack, single-feed design that came from Accuracy International's rifles and is now made by many companies. That is a real upgrade: you unload by pulling a magazine, you can carry spares, and the same magazines work across most chassis. The Magpul Pro 700L, the centerfire MDT XRS models, the MDT Field Stocks, the HNT-26, the LSS Gen 3 and the Ultradyne UD6 are all listed as AICS-compatible.

Three traps to watch for:

  • Magazine length limits cartridge overall length. A short-action AICS magazine has a fixed internal length. If you seat bullets long or shoot big magnums, confirm the magazine and the chassis suit your cartridge. Magpul says it plainly on the 700L listing: verify magazine and cartridge compatibility.
  • Not every bolt gun uses AICS. Some Ruger American models feed from AR-pattern magazines. For those, Magpul makes a Hunter American version for AR-15/STANAG magazines and Ultradyne makes the UDX6 combo for Ruger Americans that use AR magazines. Rimfire chassis generally keep the rifle's own rimfire magazine.
  • Hunting stocks may need a magwell or bottom metal. The Magpul Hunter 700 accepts Magpul's Bolt Action Magazine Well 700 for detachable AICS magazines. In a traditional stock that is inlet for it, aftermarket bottom metal such as the MDT Hunting Bottom Metal in the Badger M5 profile does the same job, adding a lockable magazine latch with tension adjustment that works with aftermarket triggers. The stock must be inlet for M5 bottom metal; it is not a drop-in for a factory floorplate inlet.

4. Understand bedding and free floating

Accuracy comes from the action sitting in exactly the same place every shot and the barrel vibrating the same way every shot. That is what bedding and free floating are for.

V-block bedding is the standard on modern chassis and better stocks: two angled aluminum surfaces cradle the round receiver, so it self-centers as you torque the action screws. MDT uses it across the XRS, Field Stock and LSS lines, and Magpul's Hunter stocks use an anodized cast aluminum V-bedding block.

Free floating means nothing touches the barrel forward of the action. Factory stocks with pressure points, or forends that flex under a bipod load, shift your point of impact depending on how the rifle is supported. A rigid, free-floated forend removes that variable. This is the main reason a factory rifle often groups better and, just as importantly, more consistently after a chassis swap.

5. Pick a forend: ARCA, M-LOK and barricade features

The forend is where the rifle meets the world. Decide how you will support it and buy the forend for that.

ARCA rail. An ARCA-Swiss dovetail runs along the bottom of the forend and lets a bipod or tripod clamp slide to any position and lock. The MDT ACC Premier Gen 2 has a full-length ARCA rail, the LSS Gen 3 Competition forend has a 10 in rail, and the HNT-26 puts an ARCA rail on the bottom of an enclosed M-LOK forend. Our rifle bipods guide covers the support side of the decision, and you can browse bipods and monopods once you know your interface.

M-LOK. Slots for sling mounts, weights, lights, night vision bridges and thumb shelves. Hunting stocks usually have a handful; tactical forends like the MDT LSS Gen 3 Tactical Forend add an enclosed top with an integrated Picatinny rail for night vision or optics.

Barricade stop and thumb rest. PRS and NRL stages have you shooting off props. A barricade stop at the front of the magwell gives the rifle something to lean on, and a thumb rest lets your firing hand stay relaxed without wrapping the grip.

6. Fit the buttstock: length of pull, cheek height and folding

A rifle that fits lets you get behind it the same way every time, and that consistency is worth more than most accuracy upgrades.

Length of pull is the distance from the trigger to the center of the buttpad. Prone and barricade positions usually want a shorter length of pull than standing, and winter layers shorten it further. Spacer systems are simple and reliable: Magpul's Hunter 700 adjusts from 13 in to 15 in, and MDT's Field Stock gives 1 in of total adjustment in 1/4 in spacers.

Cheek height puts your eye in line with the scope without craning your neck or floating your face. A scope on medium or high rings over a low factory comb is the most common fit problem we see. Adjustable risers fix it; the Magpul Hunter/SGA cheek riser kit adds height to Hunter 700, 700L, American and X-22 stocks. Pick rings first, then set the comb. Our guide on how to choose scope rings covers height.

Folding. A folding stock shortens the rifle for a truck, a pack or a smaller case. On a right-hand bolt gun the stock folds alongside the bolt handle, so look for a bolt pocket like the one on the MDT SRS-XF Premier folding stock (for MDT chassis with the XTN interface). The Magpul Pro 700 uses a push-button steel hinge you can reverse to fold to either side with a 5/32 in hex wrench. A Picatinny rear interface, as on the Ultradyne UD6, takes detachable stocks such as the Ultradyne Adjustable Stock Gen 2, which fits a 1913 Picatinny or mil-spec threaded rear interface.

7. Weigh it honestly: hunting rifle or match rifle

Weight is a feature on a match rifle and a cost on a hunting rifle. A heavy chassis soaks up recoil, lets you spot your own impacts and sits still on a barricade; MDT's ACC Premier Gen 2 accepts interior weights for exactly that reason. On a mountain hunt the same weight is a burden every step.

For carry rifles, look at the lighter end. The MDT HNT-26 is MDT's purpose-built hunting chassis, in carbon fiber with a folding foam-filled carbon buttstock, and Magpul rates the Hunter Lite for the Savage AXIS as light as 2.5 pounds. Carbon fiber and polymer are also warmer to the touch than bare aluminum, which matters on a November stand.

One more fit item: the grip. Many chassis accept AR-15 pattern grips or come with a vertical grip, and a more vertical grip lets you press the trigger straight back with less side pressure. If you are also upgrading the trigger, read our bolt-action trigger upgrade guide first and confirm the trigger housing clears the new chassis.

8. Rimfire, lever-action and shotgun stocks

Rimfire for training. A .22 in the same layout as your centerfire is excellent, cheap practice. The MDT XRS for the CZ 457, the Strike Industries SMC aluminum chassis for the Ruger 10/22 with its ARCA rail and built-in barricade stop, and the Ultradyne UDX6 combo for the 10/22 all put a rimfire into a precision layout.

Lever actions. Grip shape is the trap here: a pistol-grip stock will not fit a straight-grip rifle, and vice versa. Midwest Industries makes separate pistol-grip and straight-grip Lever Stocks for Marlin and Rossi, and the Magpul ELG fits Marlin 1895/1894/336 rifles with an oversized lever loop. Marlins have been built by more than one maker over the years, so confirm your rifle with us if it is not obviously covered.

Shotguns. Length of pull is critical because a shotgun is mounted fast, and a stock that is too long slows the mount and makes recoil worse. Spacer-adjustable stocks and short-LOP models make a shotgun fit smaller shooters and anyone wearing armor or a heavy coat.

A quick comparison

TypeExampleBest forMain trade-off
Drop-in polymer stockMagpul Hunter 700Hunting, general useLess rigid than a full chassis
Hybrid aluminum coreMDT XRS, MDT Field StockHunting and target with a traditional feelHeavier than a pure polymer stock
Hunting chassisMDT HNT-26Carry rifles that still want ARCA and AICSFewer competition features
Folding chassisMagpul Pro 700, Ultradyne UD6Do-it-all and truck riflesMore weight, more parts
Competition chassisMDT ACC Elite, LSS Gen 3 CompetitorPRS, NRL, barricades and tripodsHeaviest option to carry

Our Picks

Every product below is listed for a specific action. Order the exact version for your rifle: action model, short or long, right or left hand.

Remington 700 and 700-pattern actions

  • Best competition chassis for a Remington 700 short action: MDT ACC Elite Rifle Chassis. A full-length ARCA forend, a wide integrated barricade stop, adjustable thumb rests on both sides, an ambidextrous adjustable magazine latch and the SRS-X Elite buttstock: what a PRS shooter needs, already designed in.
  • Best match-ready kit without picking parts: MDT LSS Gen 3 Competitor (right hand). A compact 15 in competition forend with a 10 in ARCA rail, drilled and tapped for control and NV bridges, with the SRS-X Lite buttstock and AICS magazine compatibility.
  • Best do-it-all or truck-gun chassis: MDT LSS Gen 3 Tactical (right hand). The SCS buttstock on a collapsible interface gives tool-less length of pull and an adjustable cheek rest, and the forend has M-LOK on all five faces.
  • Best modular base for a long action: MDT LSS Gen 3 Chassis Base, Remington 700 Long Action. Swap forends and buttstocks as your needs change without pulling the barreled action, on V-block bedding with an ambidextrous AICS magazine latch.
  • Best folding chassis for value and for left-handers: Magpul Pro 700 Folding Chassis, Short Action. It takes right- or left-hand 700-pattern short actions and PMAG 5 and 10 7.62 AC magazines, with a reversible push-button hinge. Long-action owners want the Pro 700L, with tool-less length of pull and cheek height and an ARCA/RRS-compatible forend.
  • Best detachable-stock chassis: Ultradyne UD6 Picatinny Chassis. 6061-T6 aluminum, AICS magazines, room for barrels up to 1.35 in diameter, and a 1913 Picatinny rear interface so the buttstock comes off for transport. Pair it with the Ultradyne Gen 2 stock.
  • Best drop-in hunting stock: Magpul Hunter 700 Stock, Short Action. An aluminum V-bedding block, free floating for barrels up to 0.920 in, 13 to 15 in length of pull with spacers, and eight M-LOK slots. For long actions choose the Hunter 700L; for a lighter carry rifle, the Hunter Lite.
  • Best lightweight hunting chassis: MDT HNT-26 Carbon Fiber, Short Action (also in long action). Warm-touch carbon fiber, a folding buttstock, a bottom ARCA rail and a low-profile magazine latch built into the trigger guard.
  • Best way to run AICS in a traditional stock: MDT Hunting Bottom Metal, Badger M5 Profile, for stocks inlet for M5 bottom metal.

Tikka T3/T3x

Savage, Howa and Ruger American

Rimfire, lever-action and shotgun

9. Install it right and re-zero

Most of these are home installs, but do them properly. Clean the action and the bedding surfaces, set the action in, and torque the action screws to the chassis maker's specification with an inch-pound torque wrench, not by feel, in the order the maker gives. Before you go to the range, check that the bolt cycles, the safety works, the trigger resets, and the magazine feeds and drops freely. Then re-zero: a new bedding surface means a new point of impact, even with the same scope and rings.

Putting it together

Start with your exact action and caliber, decide on AICS or another magazine, then choose the forend for how you support the rifle and the buttstock for how you fit it. Browse the full stocks and chassis range, or go straight to MDT, Magpul, Ultradyne and Midwest Industries. Building an AR-pattern precision rifle instead? Our AR-15 stock buyer's guide covers buffer tubes and precision AR stocks.

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