|Max Velocity||760 fps|
|Front Sight||Fiber Optic|
|Rear Sight||Fiber Optic|
|Suggested for||Plinking & target practice|
|Trigger Pull||3.0 lbs|
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Things I liked: + Bolt action 8-shot repeater! + Bolt action 8-shot repeater! + Bolt action 8-shot repeater! + Comes with 2 magazines (I honestly see no reason to get more) + Lightweight & Durable synthetic stock + Requires no special holds or techniques to shoot + 11mm dovetail optics rail (I recommend UTG/Leapers scopes), you can also completely remove the front and rear sight assemblies. + Extremely easy to maintain and service, I recommend a silicone-impregnated gun sock @ Walmart for $15 for storage, especially long-term. + Adjustable lightweight trigger + Dead accurate; from benchrest I shot less than half-inch groups @ 25 yards (.177cal).
Things I would have changed: - ASA (brass thing you screw the tank in to) o-ring has a tendency to go bad after about 300 shots causing the CO2 to leak out. Just take out the o-ring and drive to your local hardware store, problem solved, 10mins & $0.50 per o-ring (buy a couple). Re-oil it at least once every 500 shots (if it lasts that long). - The obvious downside is that it runs only CO2, which practically limits the gun to summer-time shooting only. For most shooters, this is not a problem, but for winter-time hunters this is a major drawback compared to PCPs; 850 will suffer performance loss as the CO2 cools. I have not tried winter-time shooting, but I only shoot paper targets and cans. - The gun does not come with any degassing device or mechanism built into it. Once attached, unscrewing a CO2 bottle will cost you the entire rest of the bottle. You can however purchase a device for 88g's that you screw on top and acts as an on/off seal to preserve bottles.
What others should know: Recently started shooting my .177 850 again, had the thing since 2011 but put less than 1000 rounds through it. Six years later I take it out, replace the ASA o-ring, and I've had no problems with it at all. Decided, since its well out of warranty at 6 years old, to take it apart completely and clean & regrease/oil it. Internals are not crazy-complex but there are a few small parts (depends how in-depth you go really, ie dont take apart the bolt assembly theres no need). YouTube 850 air magnum disassembly. Barrel has a tendency to rust but this is completely normal for blued steel (very common on firearms and pellet rifles), like I said above just a little bit of RemOil and a paper towel/tarry cloth will do the trick, steel wool if its really bad. Buy CO2 tanks at Walmart, and o-rings for the ASA at your local hardware store or Home Depot/Lowes. Do not store it with a CO2 tank attached for more than a day or two. That's how you damage components, specifically o-rings.
Things I liked: Great air rifle out of the box. Accurate, while it lasted.
Things I would have changed: - Bottle O-Ring blew out after 5th CO2 bottle. - It should come standard with small CO2 cartridge adapter.
What others should know: After about the 5th Co2 bottle, the O-Ring blew out. I tried ordering some replacements but they didn't hold (Co2 leaked out right away). I have wasted about 5 Co2 bottles trying different O-Rings. I can't even confirm what the correct O-Ring size is for these O-rings. The replacement O-Rings from Bagnell & Kirkwood (doesn't mention size) are approx $18 once shipped from the UK. I am not willing to spend that much without guarantee they would work, so this gun is trash as far as I am concerned.
Things I liked: This is a FANTASTIC HIGH POWERED C02. RIFLE !!!!!! BAR. NONE !!!
Things I would have changed: IT SHOUL D COME WITH AN ADAPTER FOR NORMAL C02 CARTRIDGES !!!!!!
What others should know: AGAIN CANNOT BE BEAT FOR ACCURACY AND PRICE !!!!!!
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How long can you leave CO2 in the rifle?
It is not recommended to store the rifle with CO2 in it
Co2 leaks, where can I get replacement O-rings? I have. Ordered off of Amazon. It was a rip off
Give Umarex USA a call and if they won't give you the O-rings, at least get the sizing and you can likely find them either at a local hardware store or online.
Is the hammerli 850 good for a 8 year old kid.
From a bench, yes. Probably on the heavy side for a gun to carry around.
|Max Velocity||760 fps|