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Air Arms S400 Biathlon Air Rifle

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Air Arms S400 Biathlon Air Rifle

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PY-2281-4570

Lifetime limited warranty

$1,299.99

List Price $1,600.00 Save $300.01 (18%)

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Estimated in-stock date 01-06-17
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  • Description
  • Specifications
  • Customer reviews
  • Q & A: 3 answered questions
  • PCP Hookup
  • Air Arms S400 Biathlon air rifle
  • Precharged pneumatic (200 bar max fill pressure)
  • Bolt-action
  • 5-shot repeater (self-indexing rotary clip)
  • Removable air reservoir
  • Match sights: globe front accepts inserts, rear diopter (not mounted)
  • Rear sight fits on an 11mm dovetail
  • 5-way adjustable match trigger
  • Lothar Walther barrel
  • White poplar stock
  • Cheekpiece adjusts vertically and horizontally
  • Buttpad adjusts vertically
  • 4 rotary clips fit in slots in right-hand forearm
  • Beautiful deep bluing
  • Stock is flawlessly executed
  • 29.875" between front & rear sights
  • 10.25" long accessory rail
  • 12.12" to 12.50" length of pull (LOP)
  • 5.15 ft-lbs.
  • Includes owner's manual, 7 Allen keys, four 5-shot clips, fill adapter & spanner (to remove reservoir)


The Air Arms Precision Biathlon rifle delivers world-class accuracy. Air Arms is known for making extremely accurate guns, and the Biathlon is no exception. This air rifle is dressed in a unique white poplar stock with adjustable black cheekpiece and rubber buttpad. If you don't shoot competitively and just want a very accurate repeater, remove the open sights and install a compact scope on the 11mm dovetail that holds the rear sight. Because the dovetail is very short, you'll need to use a 2-piece mount.

Keep your extra rotary clips in the slots of the right-hand forearm. Load them before each match so there's no fumbling when the pressure is on!
See manual
See schematics

other products by Air Arms

Caliber0.177" (4.5mm)
Max Velocity564 fpsMeasured with 7.7-grain ammo
Muzzle Energy5.15 ft/lbs
Loudness2-Low-Medium
Barrel Length20.5"
Overall Length41.0"
Shot Capacity5
BarrelRifled
Front SightGlobe w/Aperture Inserts
Rear SightDiopter/micrometer adjustable
Scopeable11mm dovetail
TriggerFive-way adjustable match
ButtplateAdjustable
Suggested forCompetition
ActionBolt-action
Safetynone
PowerplantPre-charged pneumatic
FunctionRepeater
Body TypeRifle
Weight6.99 lbs
See manual
See schematics

other products by Air Arms

Average Customer Review

5.0 (3 reviews)
5 star4 star3 star2 star1 star
(3 votes)

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5.0 5.0

4.0 4.0

5.0 5.0

By Robert from USA on 2012-07-10
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Was this review helpful?
4.01 rating

Things I liked: Accurate and fun to shoot.

Things I would have changed: Expensive. For the money should have included Butt Spacers and Front Aperture Inserts. Would have also been nice if a prone position sling was offered.

What others should know: For target practice order the 10 pellet clip and you will not have to reload as often.

5.0 5.0

5.0 5.0

5.0 5.0

By Mary Ann from USA on 2012-05-07
See all my reviews
Was this review helpful?
5.01 rating

Verified Purchase

Things I liked: What a great rifle. The accuracy is incredible. The weight and adjustable features are terrific. A truly great air rifle

Things I would have changed: I am not convinced on the number of shots per fill, I find that I am between two and three hundred before I need to refill. Other than that a great piece of gear.

5.0 5.0

5.0 5.0

5.0 5.0

By Craig Airman from USA on 2010-03-18
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Was this review helpful?
5.01 rating

Things I liked: There are so many things about this gun to like it is hard to start. The balance and the feel of this gun is unreal and the adjustments to make it fit your body, enhance the experience. The trigger is as smooth as silk and pulls the pellet right to the target. It seems like it shoots forever on a single charge. It is very nice to have 20 rounds to shoot off without having to reach into a pellet container. It is quite and doesn't let your neighbors know what you are up to in your backyard. The gun instills confidence in you and when you miss you know that it is your technique to blame and not the gun. After a quick sight in, I was doing dime size clusters of 20 rounds quicker than you could say Air Arms, because of the 4 magazines. When you look at it there is no question that this is a quality rifle.

What others should know: You will need a few adapters to be able to use a hand pump with this gun. It seems to take longer to pump up by hand then my other PCPs. My son is left handed and doesn't seem bothered by the right handed stock when he shoots it.

Show Other ReviewsCreate an online review and share your thoughts with other customers

  • Jiri from USA asked:

    does this one have presurre regulator for better shot consistency?

    • Tyler from USA:

      It is not regulated

  • Thuy from USA asked:

    I have a Joe Brancato 4500psi air cylinder that I use to fill a Benjamin Marauder. What kind of adapter do I need to use this tank with the Air Arms S400 Biathlon Rifle. Thank you.

  • 103David from USA asked:

    So the question is this; Intersted in the Biathilon rifle, but...is it possible to get it in something other than the cheesy white paint job?

    • Val from USA:

      unfortunately not, this model only comes in this particular stock

To fill your PCP gun:
1.Pick a source of air shown at right
2.If an adapter is needed, one will be shown
3.Add both to your cart to get hooked up

Air Arms S400 Biathlon Air Rifle with DIN connector (5M)

To start over click reset

Airgun Academy Episode 38 - PCP Filling Systems

Item Description

S401D17SX05APT [PY-2281-4570]
MPR Precision Biathlon air rifle, poplar stock, & adj. buttpad and cheekpiece. 5-shot repeater.
Caliber0.177" (4.5mm)
Max Velocity564 fpsMeasured with 7.7-grain ammo
Muzzle Energy5.15 ft/lbs

This item is not eligible for coupon discounts

This product is out of stock.
Estimated in-stock date 01-06-2017.
Place your order now for delivery priority!

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This product is out of stock. Estimated in-stock date 01-06-2017

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