Big bore Airmax pistol!

[MI Yeti]

Keep us posted, bigger caliber pistols are always intresting, thats why I made a .357 pistol for myself.

Marko

I've been toying with making a big bore out of one of my Benjamin discoverys. Unfortunately the breech is so small, it would be very hard to get a larger caliber than .25 in it!

Cool pistol mod . Wish there were more larger caliber pistols available . Baker airguns makes a big bore aluminum breech and bolt for crosman airguns for a 1/2" OD barrel . TJ makes several barrel liners with a 1/2" OD . I've wanted to build a big bore pistol for a few years but I do not have the tools, I don't even have a drill press any more 

https://www.bakerairguns.com/product/big-bore/

[Rallyshark]

Nice and interesting, but can it shoot a bit faster than 530ish thats kind of co2 speeds.

Marko

I believe that pistol can do much more than it is currently getting for sure   You can pull the guts of the factory regulator, make some mods so it'll still seal, and open up some other bits in the chain to effectively enlarge that plenum a bit, then throw a Huma in there   I've had my .177 up to 25fpe with no regulator, but 20fpe is the realistic limit with the Huma installed fwiw   This is with the factory barrel, so I'm sure that little bugger can get some good numbers in .25 with a longer barrel! 

Very nice work on the build by the way!!

[Motorhead]

I just did an AIRMAX .25 conversion myself using a TJ's .25 barrel from my Warp ( 12" )
With some valve work, increases in transfer path plumbing and a huma reg with gutted OEM reg it shoots pretty well.
Can muster JSB kings @ 620 fps but finding it happier closer to 540/560 range. ( @ 17 ft lbs )

Got to shoot Camerons last week and found it quite cool to have a Big Bore Airmax ..... so, made one too 

Thanks buddy !

Scott