Umarex 850M2 CO2 Air Rifle

High quality CO2 rifle that is easy to use and very accurate

Remove the auto safety feature but you get use to the auto safety after a short time so its not a deal breaker. Make it so you can use a PCP air tank as an accessory. Have a suppressor in stock since none are available anywhere. The rifle isn't all that loud anyways but I would have purchased one if available. CO2 cover a little hard to remove but not impossible. Make the stock cheek riser adjustable.

Great rifle that you won't want to put down. Magazines are too expensive at $30.00 each. Shoots wadcutters into targets really clean. Loves 13-15 gram pellets. Put a good scope on this rifle and it becomes a tack driver at 20 yards. Walther barrel is great German quality.

Accurate once the air charge drops after 8-10 rounds have been shot using the 12 gram CO2 adaptor

Remove the auto safety. Make it so its on or off but its not a big deal.

shots well with wadcutters

This is the best CO2 pellet rifle I found so far and the bolt action is a big part of the fun. I had the Hammerli before and it is practically the same gun. However, the CO2 cover is more robust (not wobbling ) and the cheek piece has a removable raiser. I liked the new magazine. It is worthwhile to install a scope and explore the 50-yard range. The trigger can be adjusted and is light. The under rail may be useful if you want to have a bipod.

Make the cheek piece adjustable. Replace the dovetail rail by a Picatinny one. I installed a scope 14.3-inch long, with 2.5-inch space to adjust each ring, and I had to use an offset ring set (UTG AIR 322S) to have the ocular in the right position for me (12-inch from the dovetail rails front). If the frame and the rear of the guns rail were 1-inch closer to the buttstock I could have used a regular ring.

If you are planning to explore the 50-yd plus range you may consider installing a 20 MOA raiser rail to avoid using most of the scope vertical range to zero it at 10 yards. Even with a 2.5-inch Sight Height the preliminary zero angle is 4.3 MOA at 10-yd, instead of 15.8 MOA without raiser rail.
It is common having 0.25-inch group with JSB Exact Diablo Premium 8.44gr at 10 yards. All groups are less than 0.5-inch. H&N Sniper Medium 8.49gr has also a good result. The H&N Field Target Trophy 8.64gr and Match Green 5.25gr both jammed. The wadcutters spread a little more, RWS Meisterkugeln 8.2 & 7.0gr with H&N Finale Match 8.18 & 7.87gr were the best in this group.
I use the Umarex 12 g CO2 adapter. To avoid losing power, put a little lube on the adapter (keeping it vertically) and install it with the guns barrel pointing down. Five magazines in a roll gave 40 good shots. The maximum with reasonable power is 56 shots.

NOT built in China. Solid tight, smooth metal action. Decent trigger right there. Intuitive sights are light ,sturdy and bright. 2 tins later absolutely 0 troubles. Truly amazed that the Germans managed to build a rifle of this quality at this price point. Super Happy Backyard Hunter here. And no, nobody paid me for this review. Fast shipping. Thanks!

Stock options . Gonna make my own American Black Walnut thumb hole stock.

Worthy a good Scope .

Very accurate a fine rifle.

Better iron sights. Lower price.

Like I said it's a fine rifle but it does have flaws as least the one I received does. The CO2 cover latch release does not work I have to use a screwdriver to push it down. When I used the CO2 saver adapter the cover could not be closed all the way.When i removed the cartridge the saver stayed in the rifle and all the CO2 leaked out. I had to use needle nosed pliers to remove the saver. In spite of these things I like the rifle and enjoy shooting it.

Good looking rifle and a good concept

The gun needs better iron sights.

unfortunately the gun stopped working after 15 shots. There was not enough pressure to push the pellet out of the barrel. Thinking it maybe a defective CO2 cartridge, I tried 2 more. Both had produced the same result. It uses 88 gram CO2 cartridges, so they are not cheap!
To top it off, there is a document in the paper work that says "Do Not Return To Pyramyd Air". Apparently Pyramyd Air does not want to stand by their products. I was not aware of this until I opened the box.

Smooth shooting, accurate, beautiful air rifle!

Nothing!

solid feel of co2 cover not cheap feeling

Option to override the automatic engagement of the safety upon cocking.

2-12 gram co2 cartridges give 80-90 shots before loss of power. Hammerli 850 magazines do I repeat DO work wonderfully. Make sure you have an abundance of co2 and pellets and extra mags cause I did not want to put this thing down. A joy to shoot and I only quit cause it got too dark outside.

This a backyard plinkers dream.. Excellent Trigger -Great Accuracy - Ergonomics - Very Quiet - Cheek Riser -German Made Build Quality - Stock is synthetic but not junk, pretty durable and feels good to the touch. This is great target rifle!

If Umarex could add a 2nd 8rd Magazine or get spare mags to Market quicker.. 8 Shot then reload mag, 8 shots then reload mag..etc.. Also the Magazine loads from the left side of the gun so if you have a large Parallax wheel on your scope it may interfere.. I have the 100mm UTG Wheel and I can just barely sneak the mag in but its doable.. Automatic safety on any gun a bit annoying but you get use to it.

Excellent 2 Stage Trigger with a solid wall after a short 1st stage travel. I've have it in .177, been shooting it out to 45 yds knocking down Field Targets with 1in kill zone with ease as long as wind cooperates; your only getting ~ 8 FPE at the muzzle w/ JSB 8.44s. Barrel is threaded 20x1/2 UNF so I put a Donny on it and its insanely quiet and looks great. I purchased mine from Umarex USA (SORRY PA!!) because I wanted the 2x12gr CO2 adapter but wanted to post a review here for more eyes to see because this is a GREAT target rifle. I don't always have the time to shoot a complete 88gr C02 catridge and the 12gr are pretty inexpensive so the $30 adapter is a no brainer IMO..