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Diana Mauser AM03 N-TEC Air Rifle

4.53 reviews
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Diana Mauser AM03.

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  • 0.177" (4.5mm)

    Caliber: 0.177" (4.5mm), Stock: Synthetic, Handle: Ambi, Diana AM03 gas-piston powerplant

  • 0.22" (5.5mm)

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List Price $359.99, Orig.Price $329.99 Save $50.00 (15%)

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  • Description
  • Specifications
  • Customer reviews
  • Q & A: 7 answered questions

Diana Mauser AM03 air rifle

  • German N-TEC gas piston technology
  • Breakbarrel
  • Single-shot
  • Rifled steel barrel
  • Two-stage adjustable T06 trigger
  • 11mm optics dovetails
  • Ambidextrous, ergonomic stock
  • Adjustable comb
  • Anti-beartrap mechanism
  • Automatic safety
  • Anit-slip inserts on grip and forend
  • Weight 7.9 lbs
  • Barrel length 19.5"
  • Overall length 46.5"

Benefits of a gas-piston powerplant:


  • Smoother cocking
  • Smoother shooting
  • No spring torque
  • No spring fatigue, even if you leave it cocked for hours
  • Functions perfectly in cold weather
  • Lasts longer than a metal spring


The Diana Mauser AM03 is a sleek air rifle built for small game hunting. The air rifle version of the Mauser M03 hunting rifle features the 2-stage adjustable T06 trigger, along with a stock colored for hunting excursions. If you want to mount a scope, the 11mm dovetails will accommodate your optic of choice.


Diana air rifles have an excellent reputation because of their durability and quality. They've kicked it up a notch with the N-TEC gas-piston powerplant! Diana's proprietary German Gas-Piston Technology delivers smooth shooting, dependability and a decreased cocking effort. There's no spring torque because there's no coiled metal mainspring!

See manual

other products by Diana

Caliber0.177" (4.5mm)
Max Velocity1090 fps
Muzzle Energy16 ft/lbs
Barrel Length19.5"
Overall Length46.5"
Shot Capacity1
Front SightAdjustable for elevation
Rear SightAdjustable for windage
Scopeable11mm dovetail
TriggerTwo-stage adjustable
Suggested forSmall game hunting/target practice
ActionBreak barrel
Body TypeRifle
Fixed/adj. powerFixed
Weight7.9 lbs
See manual

other products by Diana

Average Customer Review

4.5 (3 reviews)
3 star2 star1 star

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4.0 4.0

4.0 4.0

4.0 4.0

By Shore from USA on 2018-09-28
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0.00 ratings

Verified Purchase

Things I liked: Nice rifle and good quality

Things I would have changed: Change rear sight adjustment to a knob or wheel instead of allen screw.


4.0 4.0

4.0 4.0

4.0 4.0

By John from USA on 2017-12-01
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0.00 ratings

Things I liked: This is a first impression review. Ive barely put any shots through the barrel but just picking it up, the feel and look say nothing but quality and precision. I will add to this as I spend more time with the gun.

Things I would have changed: Nothing so far. The fixed sights are very good but I most likely put a scope on it.

What others should know: Im sure there are many high quality pellet guns on the market but this brand is is the best Ive been around.

5.0 5.0

4.0 4.0

4.0 4.0

By m. paul from USA on 2017-10-08
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5.02 ratings

Things I liked: Well-built and rugged, simple, reliable, powerful enough to hunt to reasonable ranges (15.5 FPE from 700 FPS with 22 cal. crosman premiers), good trigger, accurate (shooting 5 pellet groups off an improvised rest at 25 yards gives me 1/2 inch groups or less with boxed crosman premiers, and slightly larger with polymags and crow magnums). Has good open sights, a good stock and a cheek riser gives proper cheek weld whether using the open sights or any size scope. Not hold sensative. You do not need special scope mounts to compensate for barrel droop as there is none on this rifle. Smooth gas spring that gives very consistent velocity each time in all weather and can be left cocked until a shot presents itself. Barrel locks up very securely. Safety is located right at your thumb, and it is activated each time you cock the barrel which is an important feature when you have such a light trigger.

Things I would have changed: Not much. Maybe make the front sight a little narrower so you can aim smaller, and cut 1/2" off the length of pull (it is a 14.25" LOP, which is more appropriate for a shotgun stock than a rifle). I noticed that you need to check the stock screws for tightness every now and then. Maybe provide sling attachment points.

What others should know: I wanted a hunting air rifle that I did not have to handle gingerly when moving through rough terrain and weather, or that required ancillary equipment like my PCP, or that had a rough trigger or other accuracy or reliability issues/headaches. This rifle fits this role perfectly. A self-contained, rugged, reliable small game hunter you can take anywhere in all conditions. It is worth the price as it is a big step up from lesser rifles. It also serves well for cheap ammo target practice you can do right at your home as it is not hard to cock and can be very accurate thereby challenging you to improve your skills and shoot to the rifle's potential. PA shipped the rifle very quickly.

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  • Curtis from USA asked:

    Is this gun based on another Diana gun? Trying to find disassembly instructions for my am03.

    • Tyler from USA:

      Very similar to the 340 NTec

  • Jakov from Croatia asked:

    Diana Mauser AM03 N-TEC Air Rifle 0.22 how many joules this gun has? Is there anything above 30 joules with calibar 0.22? I have 0.177 cal with 30 joules is there something stronger ?

    • Tyler from USA:

      This should be right around 30-31J in .22 caliber

  • Robert from USA asked:

    Has anyone used this as a small game hunter? Accuracy? QC issues? Barrel droop, etc. etc.?

    • Tyler from USA:

      Sure. Taken a few squirrels with it. Very effective out to about 40 yards for me when I do my part. Mine didn't have any noticeable droop. At 40 yards I can hold 3/4" groups with H&N Field Target Trophy pellets in .22.

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Item Description

DIA-503427505 [PY-4168-7961]
Diana AM03 gas-piston powerplant
Caliber0.177" (4.5mm)
Max Velocity1090 fps
Muzzle Energy16 ft/lbs

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