Crosman MK-177 Pellet-BB Multi-pump Air Rifle Table Top & Shooting Review


Type: Pellet/BB Multi-pump Air Rifle.


Model: MK-177.

Materials: Plastic with some metal.

Weight: 3.5 pounds.

Barrel: 16.75 inches, rifled.

Propulsion: Multi-pump.

Action: Single shot - bolt action with manual advance magazine.

Ammunition Type: .177 caliber pellets & 4.5mm steel BB's.

Ammunition Capacity: 5 shot pellet magazine - 18 shot BB internal BB magazine - 350 round BB hopper.

FPS: 750 with Pellets and 800 with BB's for the US version (Up to 495 with Canada version).

Trigger Pull: The trigger pull on the Crosman MK-177 is medium length and fairly light. The trigger mainly releases the bolt so no pre-cocking of the trigger is required. The trigger is plastic but seems to work just fine as there is no real load on the trigger when shooting, you do need to get used to where the release point since there is some take up well before the trigger releases.

Accuracy: I found the Crosman MK-177 Air Rifle to be a very good shooter, getting about a 1 inch 10 shot grouping from 30 feet out in a semi rested position (sand bag up front, standing in the back). I also put 3 rounds through my somewhat failing Chrony Chronograph using 3,5 & 10 pumps and the MK-177 with the maximum 10 pump shot as high as 631 fps using 6.9 grain RWS lead pellets. I would expect the Canadian detuned version to shoot well below the 500 fps Canada limit much like my Canadian Crosman M4-177 I reviewed a while back.

Build Quality: The Crosman MK-177 Multi-pump Air Rifle is mostly molded plastic, but for a $100-ish Military Styled Replica Air Rifle it hits the mark in terms of affordability and if it was an all metal airgun you would more than likely expect to double or tripple this price point! Even though plastic is used throughout this Air Rifle, there are some internal metal parts where they need to be, the fit and finish seems to be good and I do not get the feeling the Crosman MK-177 is cheaply made in any way. The fact that most parts are molded means there is very little that can snap or break off and will make this air rifle even more durable longterm.

Realism: The Crosman MK-177 is a lose replica or copy of an FN SCAR Assault Rifle or ACR. It is not exact in terms of true dimensions to accommodate the pumping mechanism, You will not find very many working parts as just about everything is molded into the plastic on this Crosman MK-177 rifle. Unlike the Crosman M4-177 the lower magazine area is not removable and the rear stock is also none adjustable, I am not sure why Crosman didn't add these features to the MK-177 like they did to the M4-177? I am glad to see another Replica Assault rifle on the market as so few of them are available in Pellet or steel BB shooters.

Available in the:Replica Airguns Store.


  • The only SCAR Pellet/BB rifle I know of?
  • Fairly well priced.
  • Excellent accuracy!
  • Very easy to pump.
  • None red dot version comes with detachable and adjustable iron sights.
  • Rails on top and sides for accessories.
  • Option of shooting pellets or BB's, I would stick to pellets and save the barrel since it is not semi auto.
  • Feels super solid since there are very few moving parts that could break.
  • Looks like the Crosman M4-177 Pellet magazines are compatible.


  • Mostly plastic and just about everything is molded into the gun.
  • Bolt and magazine are on opposite sides?
  • Would of been cool if Crosman made a dedicated BB magazine?


The Crosman MK-177 Multi-Pump Pellet/BB Air Rifle is very much like it's brother the Crosman M4-177 with a few plusses and a few minuses when comparing the two of them together. On the plus side the MK-177 has a bit more power and also the pumping is much easier while yielding higher internal pressures. On the downside the Crosman MK-177 is almost entirely molded plastic with no removable lower magazine or adjustable stock, and the bolt has been switched around to what I feel is the wrong side since now you need to index the magazine on one side and work the bolt on the other requiring a less efficient approach. Either way it is nice to have another replica air rifle on the marker and for the relatively low price you get a nice accurate pellet rifle, great for target shooting and even small pest control.

Watch my YouTube Full Video Review of the Crosman MK-177 Pellet/BB Air Rifle:

4.5mm / .177 cal, BB, Comparison, Field Test, Multi-pump, Pellet, Repeater, Review, Rifle, Scope, YouTube Video Crosman, MK-177