Date: 17/2/2019 1:55

Smith & Wesson M&P 45 CO2 Pistol

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  • Description
  • Specifications
  • Customer reviews
  • Q & A: 2 answered questions
  • Smith & Wesson M&P 45
  • CO2-powered
  • Semiauto
  • 8-shot rotary pellet clip & 8-shot rotary BB clip
  • Shoots pellets or steel BBs
  • Double- and single-action*
  • Fixed front sight
  • Rear sight adjustable for windage
  • Integral accessory rail
  • Synthetic frame
  • Textured grip
  • Manual safety

*You can pull back the rear part of the slide to shoot the gun single-action, however Umarex lists this gun as double-action only.

The manufacturer states that the M&P 45's velocity is 370 fps. A recent velocity test showed that BBs delivered 360 fps and pellets 350 fps.

The owner's manual says the gun is 7.10" long. That's a typo. It's really 8.10" long.

The S&W M&P (military & police) air pistol is a dead-ringer for the firearm handgun made by Smith & Wesson. If you like to use airguns to gain or retain proficiency for your firearms, this will help you do that. While the firearm will have more recoil, you'll still be able to get the feel of the gun, the weight, the handling characteristics...and more from shooting the air pistol version.

Shoot either steel BBs or lead pellets through this CO2 gun.
youTube video
See manual

other products by Smith & Wesson

Caliber0.177" (4.5mm)
Max Velocity370 fps
Barrel Length3.3"
Overall Length8.1"
Shot Capacity8
Front SightBlade & Ramp
Rear SightAdjustable for windage
Suggested forPlinking/Fun
Trigger ActionDouble-Action & Single-Action
Body TypePistol
Weight1.35 lbs
See manual

other products by Smith & Wesson

Average Customer Review

4.5 (47 reviews)

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4.0 4.0

5.0 5.0

5.0 5.0

By Steven from USA on 2018-12-09
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4.52 ratings

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Things I liked: I really like the feel of this gun. It is the same size as the firearm and feels good in the hand. The accuracy of this gun is excellent and I was surprised I could get 1 inch groups at 15 feet. The gun is actually more accurate than me. Also liked the 3 dot sights, which are yellow but are very easy to acquire.

Things I would have changed: I would prefer an all metal piercing tab, the plastic tab is a bit of a struggle for my old hands. I would like a smoother double action trigger pull, however, its okay for a $65 gun.

What others should know: The single action trigger pull is crisp and makes for excellent accuracy. The double action trigger pull is rather heavy. I did discover that the double action trigger pull was slightly better if the pellets are seated in the rotary magazine with a pellet seater. The gun is not pellet picky. I got very good groups with Wadcutter, domed and hollow point pellets. Using Umarex CO2 canisters I got 152 shots, but with Crosman CO2 canisters I got only 68 shots. I also had 2 Crosman CO2 canisters that would not seal and leaked out all the gas. I highly recommend using Umarex CO2 and avoid Crosman CO2. I have shot about 1,000 rounds through this gun and I am extremely happy with it. I recommend this gun for a fun plinker.

4.0 4.0

4.0 4.0

4.0 4.0

By Herb from USA on 2018-08-28
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5.01 rating

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Things I liked: I like that it's SA and DA or revolver/fake semi-auto or whatever. I like that it's not blow back as I want the CO2 just launching pellets - although in a airgun of this type there's some blow-by/loss. I like that the barrel is rifled so I will choose pellets every time over BBs. I like the rear sight is adjustable and that the sights are good enough that I'm able to produce 1"-1.5" groups of 5 at 50' often. Blasting small cans at out to 50'-60' is no problem. Figure 8 eight shot mags per CO2 - maybe 6 on a day in the 60s F. temps.

Things I would have changed: I'd have $300 versions made in .22 with say 3" more of quality bbl, refined trigger, refined tuned performance valve and sealing. 20 shot belt looped mag fed launching 14.3 gr. pellets at 400 fps MV on a 80s F. temp day. I'm being reasonable :-)

What others should know: I use the short bent end of a small Allen wrench to press the pellets just in flush or so. I've gotten pretty good and fairly quick at it. Some smaller dombed and pointed pellets will work/fit. With CO2 bulb/cartridge in and ready to twist knob to pierce hold pistol with butt down and quickly twist knob snug then back off quarter turn or so. If that floppy knob slips your fingers you may end up dumping the CO2 charge - that's no fun! The slight backing out is to improve flow from bulb/cartridge. A dab on oil on the nipple of every 3 or 4 CO2s will keep the 'smith' away. LOL


4.0 4.0

4.0 4.0

4.0 4.0

By Steve from USA on 2018-08-27
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5.01 rating

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Things I liked: Accurate. Fun to shoot with the 8 shot mag.

Things I would have changed: The trigger pull. It is hard and crude. Add a better trigger and this would be golden.


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  • Lawrence from USA asked:

    How often do I change co2

    • William from USA asked:

      Could the bb mag be used in the berreta 92 fs?

      • Robert from USA asked:

        this gun should take care of rabbits, yes?

        • Douglas from USA:

          No it is way too underpowered to allow an ethical kill on any small animals. If you want to shoot rabbits; you should get a Crosman 2240 -as it would be suitable at very close distances.

      See all discussions

      Item Description

      SW-2255060 [PY-2458-4930]
      S&W M&P 45, incl. 8-rd pellet clip & 8-rd BB clip
      Caliber0.177" (4.5mm)
      Max Velocity370 fps

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