The .177 Avenger mag is the same as the .177 m-rod mag.

You all may know this - I didn't. I was shooting my Air Venturi .177 Avenger today and kept telling myself, "These Avenger magazines sure like the mags that my .177 Benjamin Marauder takes". So, I loaded up an M-rod mag and stuck it in the Avenger. The fit was perfect, so was the cycling, it worked flawlessly.



Then, I wondered if the cost was the same, or different, based on which gun you buy the mag for.

Pyramid Air wants $14.95 for an "m-rod" mag,

https://www.pyramydair.com/s/a/Benjamin_Marauder_MAR177_Rifle_Mag_177_Cal_10rds/2760

And they want $11.99 for an "Avenger" mag. 

https://www.pyramydair.com/s/a/Air_Venturi_Avenger_Magazine_177_Cal_10_rds/8817

Ha, they are the exact same magazine. What do you think about that?


 
that is interesting, i wonder if it carries over to .22 etc .. i was alittle miffed that the new benjamin mags for the craftsman line are not compatible with other benjamins, you'd think, ya know .. theres some other cool compatibilities out there .. right now im wanting a diana bandit pcp pistol, and theres another gun the 'chaser' thats like its carbon copy in CO2 that comes with a rifle length barrel you can swap in and a shoulder stock, and im pretty sure if you have both that a bandit can be built with the rifle barrel and shoulder stock .. so yeah im watching every day hoping a shipment comes in lol ...
 
In .177 and .22 caliber, Marauder, Gauntlet, and Nova Vista made mags (Avenger, Liberty, Origin, Aspen/Freedom) can all be used interchangeably. The Nova Vista and Gauntlet mags are pretty much identical in spec. I use a Gauntlet mag in my Liberty and it snaps firmly in place like the OEM mag. Marauder mags work as well, but they don't fit as well as the other two. 

But in .25 caliber, it's a different story. The Nova Vista mags are a bit thinner than other Marauder style magazines, therefore, Gauntlet and Marauder mags won't fit in the breech.
 
The Nova Vista and Gauntlet mags have rounded edges on the revolver, vs sharper edges on the Mrod. The rounded edges are better for the O-rings on the bolt probe. That being said, the Mrod 177 mags seemed to fix a cycling problem that NV/Gauntlet mags didn't, on a 177 Liberty.

PS: The 25 cal Nova Vista mags are the same dimensions as the 177/22 mags. While thinner than Mrod, still will fit the 34g JSB. I use them in caliber change projects.