The AR Air Rifle: The Crosman MAR177 PCP Conversion Kit

Yes, ammo is coming back in stock at reasonable prices, but sometimes a product just catches my eye. The product this time is the Crosman MAR177 PCP conversion kit, which transforms your AR into a Pre-Charged Pneumatic air rifle. The “Modular Adaptive Rifle” fits without modification to any AR-style lower and fires common .177 caliber pellets.

Image courtesy of

Image courtesy of, which has an excellent gallery of photos from testing. Click on the picture to be taken to the gallery.

The MAR177, by design, resembles the M16 in its A2 form, with long barrel, handguard, and iron sights. Crosman states this is for “target use only”, which makes sense since  the conversion achieves only 600 FPS (For reference, AirForce and Gamo tested or currently in-testing go above 1200 FPS). An advantage of the reduced FPS is efficiency. A full tank can get up to 120 shots prior to refill out of the 3000 psi tank mounted beneath the barrel.

The upper, unmounted to a lower receiver.

The upper, unmounted to a lower receiver.

With its long sight radios and free-floated Lothar Walthar barrel, the PCP rifle conversion looks to deliver excellent accuracy. It is bolt-action (charging handle pull) and feeds from a 10 round rotary magazine. Crossman claims that it is shipped ready for “national match” air rifle competition.

A glimpse at the internals, courtesy of the NRA's Blog.

A glimpse at the internals, courtesy of the NRA’s Blog.


Originally released in 2011, this kit has been on the market for some time. The MAR177 retails for $650.

Hit the video below for a detailed overview. *Note- Those who dislike the confusion over “clips” and “magazines” will cringe. 


Specifications Overview

  • Model Number MAR177
  • Velocity Up to 600 fps
  • Weight 7 lb. 6 oz.
  • Length 28.5 in
  • Mechanism Bolt Action
  • Power Source PCP
  • Caliber .177
  • Ammunition Pellets
  • Capacity 10 Shot Magazine
  • Barrel 21 in
  • Front Sight Removable post with adjustment
  • Rear Sight Carry handle adjustable flip peep
  • Optics Rail Picatinny

Nathan S

One of TFB’s resident Jarheads, Nathan now works within the firearms industry. A consecutive Marine rifle and pistol expert, he enjoys local 3-gun, NFA, gunsmithing, MSR’s, & high-speed gear. Nathan has traveled to over 30 countries working with US DoD & foreign MoDs.

The above post is my opinion and does not reflect the views of any company or organization.


  • Zachary marrs

    Good fof plinking, hunting with it is asking for trouble, imho

    • Billy

      Double nope.

      If it was match grade to 50 yards, or had usable velocity for small varmints…. and only $200, then we could talk.

      As-is I’ll take a Gamo whisper series that will take care of all these dang woodchucks and shoot tiny groups. For $150.

      • PCP air rifles are easier to shoot well than springers, and usually much easier to shoot well than inexpensive magnum springers.

        • iksnilol


          Problem with springers is they require a conpletely different way of holding and aiming it. Thus they are bad training guns.


          You know that airguns are harder to make than most firearms? If it delivers good (match) accuracy then 650 is cheap for a PCP. This is an airgun made for competition shooting (accuracy oriented).

  • Ryan

    $650 American dollars? That’s not going to save anyone money

    • I’ll give you that the barrier to entry is fairly high, but it’s $10 for a tin of 500 high-quality pellets, vs. maybe $60 for 500 rounds of cheap 22LR or $140 for the cheapest .223 available. And you can shoot pellets in an apartment or basement, if you want.

  • 101nomad

    $50.00 Crosman, tons of fun. Want competitive? Whole new ball game.

    • iksnilol

      You seem to understand it.

  • Zachary marrs

    I remember when I went to the range with my grandpa, he saw a dud .223; to which he said “pretty soon they’ll be shooting pellets! ”

    I didn’t think he was serious, guess the jokes on me

  • No Words
  • Gabe

    One thing the article doesn’t mention is these are designed for competition accuracy shooting. There are specific competitions just for these rifles. So for those that don’t understand the price, this is what would be considered a “match” or competition air rifle, which $650 isn’t that bad. Compared to a Anschutz 8002 this thing is a steal.

    • iksnilol

      Like it except for that charging handle. I like target guns but would be cool if they made a version with a pump-action instead of having to pull the charging handle (+ adjustable velocity).

      • Gabe

        sounds like the Hatsan AT44PA is the air gun for you! Not really a match grade gun but pump action and powerful enough to bring home small game.

        • iksnilol

          Pretty much what I wanted. Also it isn’t that expensive, only 400 USD. Especially when considering how little in the airgun market you get in Norway for 400 USD. Gonna note this one.


          • Gabe

            I’m a big fan of Hatsan guns, they are made in Turkey, are very high quality and they are very well priced. I have a .22 springer from them and it helped me get rid of the squirrels that decided my attic was a cozy place to live.

  • Geoff a well known Skeptic

    My SWaMPy AR15 Sport was 599.99. I don’t see the value here when a reasonable target .177 pellet gun is $200 or so. Geoff Who is skeptical.

  • dan citizen

    Where this really saves you money is when you want to target practice in the house.

  • me ohmy

    price point frankly sucks, compared to a more typical GOOD power level and accurate traditional AIR RIFLE.. it is way expensive

  • Aurek Besh

    I can’t help but think that since this uses the receiver from an actual firearm, it could cause legal trouble for owners (since the receiver is legally the firearm itself in the US) that just wouldn’t exist with a dedicated airgun. I’ve participated in airgun matches and training that took place on ranges owned by schools and religious institutions, this airgun would have been a no-go.

  • Crosman Corporation

    Not mentioned in the article is the MAR177 is specifically designed for 10m national air rifle competitions. 600FPS is all the speed that’s needed and contributes to the rifle getting 120 shots per fill. It’s not a hunting gun. Non-competitors love it because they can shoot in the basement, saving fuel & time needed to get to a range. Because it uses a standard spec lower, users get all the trigger practice time with a fraction of the ammunition cost.

  • JR

    This is made for service rifle competitors who wish to practice using their own lower. It saves them money and allows quite practice just about anywhere. It is not meant for pest control or “fun shooting”. It is meant for serious competitors and for them it is a bargain.

    See here for more (Pilkguns was co-designer)

  • JR

    Uh, that should be “quiet” not “quite”

  • Iceman13

    So now we have a registered Air Gun to go with our registered Cross Bows!

    No thanks!

  • stealth916

    Say, don’t forget to add $225 for a hand pump and QD air fitting.

  • Rick

    damn. so close. a little too small, a bit too slow, a bit low energy, and a bit expensive

  • ShiningKnight

    I wish the velocity was higher. I would probably buy one.