OK, I am a new member and can't seem to navigate with search, so I will start this as a new topic. What are the best mods, NOT including a longer barrel or stock (I don't want a carbine, only a pistol) to increase power in a Crosman 1322 ? And what gives the most "bang for the buck" ?, no pun intended. I don't want to spend $500. on mods, if I was going to do that I would buy an Evanix. Are there some reasonably priced high pressure, total air spill cylinders ? Pardon if I am not using the proper terms. Also, is there ANY CO2 air pistol which can be modded up to similar power as a modded 1322 ? I would ideally like to get around the idea of 40 pumps for a max power shot, but maybe I am asking for too much. Thanks for any advice.
mods for 1322
- Thread starter biggdonn101
- Start date
I'm not a 13xx "expert" but I do have one in both .177 and .22 caliber. Probably a flat top piston and valve would be a good start and they can be internally ported/modded to hold and flow more air. I have steel breeches on mine as well but that isn't so much a power addition. Metal barrel bands/sights are also good for stability and reliable funtion. IMO they are very good pistols and the aftermarket support is, I suppose, still quite high.
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flat top piston and valve
change the valve spring to a lighter one
polish and lube (burnish in some moly etc) the hammer and the race way it runs in
rear velocity adjuster
work the sear contact with the hammer. reduce that drag and the hammer will have slightly more energy.
these are small pistols, you'll quicly bump into the inherent limits of just 10 pumps. and all these mods added up will add some power..... still gonna be on the low side...
change the valve spring to a lighter one
polish and lube (burnish in some moly etc) the hammer and the race way it runs in
rear velocity adjuster
work the sear contact with the hammer. reduce that drag and the hammer will have slightly more energy.
these are small pistols, you'll quicly bump into the inherent limits of just 10 pumps. and all these mods added up will add some power..... still gonna be on the low side...
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THANKS, GUYS !! The one set of things that seems to be unanimous is FLAT TOP PISTON AND VALVE. And it looks like those are pretty reasonable price wise. I think I will make those my starting point !
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BD, I know you said not spend $500.
This pistol started as 1322:
https://www.airgunnation.com/topic/crosman-gurus-plz-advise-a-newbie/#post-537137
Lots of potential, but can be lots of money.
It now has a foldable stock. It is now dual fuel, co2 and hpa using a hipac.
I agree that porting tp, valve, and boring both bigger should help your fpe .
Have fun.
Welcome to the addiction
This pistol started as 1322:
https://www.airgunnation.com/topic/crosman-gurus-plz-advise-a-newbie/#post-537137
Lots of potential, but can be lots of money.
It now has a foldable stock. It is now dual fuel, co2 and hpa using a hipac.
I agree that porting tp, valve, and boring both bigger should help your fpe .
Have fun.
Welcome to the addiction
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A little info on modding the 1377
https://thegreencrosmanforum.proboards.com/thread/75/more-piston-valve
https://thegreencrosmanforum.proboards.com/thread/75/more-piston-valve
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"Also, is there ANY CO2 air pistol which can be modded up to similar power as a modded 1322 ?"
Yes, Crosman Co2 pistols of similar barrel-length to a 1322 can easily be modded to exceed 500 FPS with medium-weight .22 pellets.
Yes, Crosman Co2 pistols of similar barrel-length to a 1322 can easily be modded to exceed 500 FPS with medium-weight .22 pellets.
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If you’re going to be increasing the power, make sure to buy a solid pin, for the pump linkage, from Mellon air. After you take the gun apart a few times the stock rolled pin will become loose and eventually work its way out while pumping with a modified 1322. Also it prevents the pin holes from enlarging.
To achieve all of its potential power, set the adjustable piston so that it makes contact with the valve when the pump arm is half inch away from closing. This ensures there is no gap in between the piston and valve allowing you to pump the maximum pressure into the valve.
To achieve all of its potential power, set the adjustable piston so that it makes contact with the valve when the pump arm is half inch away from closing. This ensures there is no gap in between the piston and valve allowing you to pump the maximum pressure into the valve.
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