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CO2 powered Umarex 850 Airmagnum

CO2 powered Umarex 850 Airmagnum

I've been a great fan of CO2 pistols since they came off the ‘prohibited’ list– in fact they should never have been on it in the first place. At that time ‘real’ handguns had just been banned (in 1997), and while CO2 replicas would never replace real ones with pistol shooters, they certainly did draw a whole new group of people into shooting sports, and in doing so saved some gunshops from the worst financial effects of the post Dunblane legislation. Some of the best CO2 pistols come from Umarex, and there’s no doubt that they have proved extremely popular. They were realistic looking, fairly accurate and offered a quick fire medium for competition handgun shooters within the new firearms legislation. I even bought a S&W replica revolver myself, even though I never got into the competition side of CO2 pistol shooting.

Although CO2 pistols certainly took off, gas powered rifles weren’t as successful. This was mainly because of two factors; CO2 rifles generally lacked the power for hunting or pest control (most gave significantly less than 12ft/lbs of muzzle energy) and they ran through standard 12g CO2 gas capsules at a rate of knots. This latter factor meant that you had to ‘power them up’ with gas capsules at a fairly frequent intervals, and of course you had to pay for the capsules – around £6.50 or so for a 10 pack.

For these reasons I never really got all that interested in many CO2 rifles – apart from a few…

.22 on Test - .177 Available

Pop out Auto or manual safety button with disengaging slide (hold slide down and push button forward) red dot shows when ready to fire

Undo cover – press bottom of forend in and pull forward to remove front cover exposing inlet valve. Screw in 88g CO2 capsule or double 12g adapter. Dry fire to make sure that capsule in fully engaged and pierced. Dry fire to make sure. Never remove a full 88g capsule as the high pressure gas could damage the seals.

8 shot mag pellets held in by O ring on the right hand side plus bolt has to be lifted up out of retaining slot and withdrawn. Pellets up to 10mm in length can be accommodated in the magazine.

Trigger Adjustable For Travel.

Pellet jammed in barrel through drop in CO2 pressure – replace capsule but not magazine, then shoot pellet out. If not, lay the rifle horizontally and clear jammed pellet with a cleaning rod.

Low on gas?
Discharge crack is muted
Pellet drop
Pellet sticks in barrel – extreme case

story continues below...

Sliding wedge sight adjustment for elevation; high – move back low – move forward
Front sight for windage. Two green rear and red front hi viz??? fibre optic

41” length
92 oz weight
654fps – 16 joules
23.6” barrel

Moderator available (ref. 465.101)

Picatinny style scope rail
Stock synthetic

Umarex CP88 with Walther Multi Dot Sight MDS
Frame release gices access to magazine
Grip plate release button
Cartridge lock at bottom of grip
Hammer

Flat heads recommended but domeheads working, providing they are not longer than pellet chamber.

Double or Single Action

8 x 3 mags
.177
7” (180mm) long without mod 11.75” with mod (300mm)
2lbs 11.75oz (1.238g)
393fps
Rifled Barrel 4” (100mm) or 8 5/8” (220mm)
Manual safety
Trigger safety when slide open
Detachable moderator 90g or 3.25oz
120mm moderator


Electronic red dot sight mounted piccatinny rail – red aiming dot projected onto front lens – as you don’t have to line up front And Rear, you can just point and shoot keeping both eyes open. Ready mounted = locking screws on base. 7.5cm (3”) eye relief. On/off switch, battery housing combined with rheostat 1 to 7 – lines up with left side. MOA lever (dot size adjuster) – four sizes available.

3v lithium battery CR2032 – when red dot gets darker or disappears

Elevation and windage – release locking screw (on the base below windage adj.screw) with Allen key supplied, and adjust Elevation and windage screws to suit. Each click moves the point of impact 1/3 MOA – 0.97mm at 10m or 9.7mm at 100m. Retighten locking screw.

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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  • CO2 powered Umarex 850 Airmagnum - image {image:count}

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gun
features

  • Field of view: 15.7m at 100m
  • Lens dia: 23x34mm
  • Flat: Black
  • Length: 82mm
  • Weight: 115g

32 Comments

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    Ellspah
    19 Feb 2020 at 10:28 PM
  • IS THIS SEAL FIT MY S&w MP40(mp) cO2 AIRGUN?

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    Lupe V. Medina Sr.
    19 Jan 2018 at 10:06 PM
  • just bought second hand air magnum 850 worked great till 88g canister ran out bought 9 new seals and used 7 canisters but all go of when screwing in HELP

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    Mike
    23 Aug 2017 at 01:36 AM
  • I bought refillable 88 grm co2 cylinder and filled it with hpa and it works fine as long as you do not fill it above 1250 psi you have got to fillit while it is still attached to the rifle and can not unscrew it of until yo dry fire it empty and it works just fine you get about 70 shots per fill it works it gives you the choice between co2 and hpa

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    Thomas rae
    25 Feb 2016 at 12:51 AM
  • hi , i have an 850 its a great air gun . the only problem i have with it is the 88g cartridges . if fitted and then not used for a while the gas escapes and a new cartridge is required . perhaps you know of a refillable answer ?

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    rich
    25 Nov 2014 at 09:17 PM
  • Could somebody help me please, I stripped down my umarex 850 Airmagnum . but there is one part I cannot work out where it goes. The part is called shot holder I Know the name of the part only because ive seen a Diagram of all the parts, but it didn't tell me where they all go so Im at a stand still.

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    Mr phil Mulholland
    08 Jul 2013 at 08:01 PM
  • hi
    i just change oil ring for umarex850 for gas co2 88 g
    i dont know size it for change
    pls help me for size it
    kind and size ring please
    send to email kind and size ring gas co2
    thanks

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    rahman salehi
    28 Jun 2013 at 01:46 PM
  • I accidentally shot myself in the foot. Pellet went straight through; nice clean hole though. Wish I was shooting with a Air-soft that day!. Normally I can´t hit a barn door at 6 ft but this nice piece of kit makes me feel like a real Pro; apart from shooting myself in the foot, of course!

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    Ian Hoskins
    14 Jun 2013 at 07:23 PM
  • Just wanted to no are all air magnums 850 faulty am thinging of getting one my self so just asking

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    david
    02 Mar 2013 at 02:01 AM
  • I have a 850 in .177cal. I have used both the 88g tanks and the CO2 adapter using 2 CO2 carts. I found both CO2 delievery systems to be effective. Over 150 shoots using 88g paint ball carts. and over 50 shoots using the CO2 adapter and 2 carts. Obviously one of the reviewers had a defective product so I thought I would offer my experience for balance. Nice gun but a little heavy.

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    James Butler
    31 Dec 2012 at 05:30 PM
  • Bought a Umarex 850 Airmagnum after reading al about it super reports plus affordable. Well it arrived ( something missing co2 tank ) got a 88grm cylinder & adaptor, It would not fit the hole, Come to find out there was a small cylinder missing which takes 2 stupid little co2 capsules,which are suppose to fire approx 40 - 70 shots. The first 8 shots are accurate but by the time I get to 20 they have dropped 4 inches over 30mts.Apart from slinging it in the bin is there anything I can do to improve it.

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    Alan Williams
    21 Aug 2012 at 03:12 PM
  • I have been thinking of getting this rifle but I have some questions to ask if anyone is willing to answer.

    I have heard only good thing, are there any down sides?

    Do you receive anything with it to let you know what the power of it is?

    And is it worth getting a Co2 converter?

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    luke
    26 Mar 2012 at 09:20 PM
  • Rick Baker ive had the pleasure of shooting an owning a lot of top end models of pcp from owning the r10 hammerli ar 20 daystaes a few i do rate the umarex 850 as a good gun in its price braket its not as accurate as a pcp but its well on par with a good quality gas ram or springer i had no problems grouping well up to 40 meters have had a good plink out to 80 or 90 hitting a ballon time and time again and for genral plinking its highly addictive , obviously your not going to win any ft or hft rounds with this but for the fun asspect and the fact when it was released it ws the top co2 money could buy , i think you maybe got a dud or perhaps your shooting skills are not that good perhaps you didnt put the scope on righ or varias other problems , its a good fun solid gun for 400 quid for the full kit what have you got to cpomplain about

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    ian77efc
    24 Mar 2012 at 08:05 PM
  • How can anybody class this as a good gun, bought one 6 months ago and it was nothing but trouble. Total crap in cold weather, problem with pellet pulling back into the mechanism, crap hammer spring and piston. lousey accuracy. total bag of shit, even down to the stock. Anybody who
    rates this must be on magic mushrooms. get a hw100s and see . But if you have to have a 850 get the 177 as the 22 is just a joke. Its about time someone told the truth.

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    rick baker
    19 Dec 2011 at 11:37 PM
  • iv got mine coming tomorrow in 177 form got a really good deal from pet pet pet the pet shop near the grenidier pub in hangleton brighton sussex £345 for gun silencer scope and bag one gas tank really looking forward to getting out hunting me and a friend have found two good places to shoot (with permission) and both our tallies r 4 rabbits we went the other day at night and in the morning he got 1 on each occation i got none as i only had a crossman ratcatcher in .22 and it just didnt have the distance that his rifle had so i thought right im not having that and went and broght the 850 so glad i found this :<)

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    brad
    26 Jul 2011 at 01:05 AM
  • Glad you like the Umarex 850, it was groundbreaking when it came out with the recoilless action of a precharged pneumatic (PCP) at a very affordable price. My only problem with it is the cost of replacement CO2 canisters, but swings and roundabouts, the initial cost is far less than a PCP and charging gear.

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    pat farey
    08 Aug 2010 at 05:44 PM
  • As an ex infantry soldier when i came out a few years ago i looked to take up air rifle shooting here in the uk, and i have to say when i went and got my self a umarex 850 i had so much fun i couldnt stop shooting it all day the action of this rifle and the cocking is a joy you have to be a little forcefull with the bolt but making sure you load your mag correctly you wont have any problems reloading ,as far as accuracy goes anything up to 40 meters your going to have quite a tight group within 1.5 inches depending but considering the price its absolute quality to shoot with ,id recomend a decent moderator other than the one you buy in the xt kit and also a decent scope put it all together you have a top rifle wel worth the money out of 10 id have to give it a 8.5 .happy shooting guys stay safe

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    ian77efc
    08 Aug 2010 at 05:10 PM
  • IM AFTER ONE OF THESE GUNS NEW OR USED 177 OR 22 CALL
    PLEASE CALL 07941213054 REGARDS DAVE


    CO2 powered Umarex 850 Airmagnum

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    DAVID ROY LATHAM
    23 Sep 2009 at 10:34 PM
  • I picked up a 850 air magnum carbine from CH Westons in Brighton. INCREDIBLE! Accurate, and with enough power to take any small vermin. And great fun for plinking as well. Only problem is the C02 running out, and the replacement bottles being about £8 a pop. I highly recommend this rifle (especially the carbine) to experienced shooters, or newbies.

    P.s. The magazine is a bit pellet fussy (especially with older style pellets like Bisley magnums.) RWS superdomes, or superpoints are superb.

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    Pat
    05 Sep 2009 at 01:01 PM
  • Gun shoots great very adictive, Nice & light in weight. can be very expencive in gas & preasure drops with temperture. I f you are wanting to us it a lot. save money & get a pcp & air tank you will soon get your money back.

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    john townsend
    24 Jul 2009 at 08:32 AM


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