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Air Gun Home Forum Index » Rifles » 2240 to 1377 conversion
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2240 to 1377 conversion 
PostPosted: Sun Aug 21, 2016 8:14 pm Reply with quote
2240man
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Hey guys,

I currently own a crosman 2240 with 14 inch barrel, steel breech, and stock.

However, I am tired of buying Co2.

Is it possible to buy a 1377 and SWAP THE BREECHES so the 2240 was 177 and the 1377 was .22? If so, how would this affect performance in both guns?

Thanks

2240man

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PostPosted: Sun Aug 21, 2016 10:45 pm Reply with quote
AirGunEric
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Yes, you can swap the breech, barrel and bolt (to match barrel caliber) between the two- but you would need to drill out the barrel hole in the 1377 barrel band to hold the longer barrel.

It would result in a .177 Co2 pistol around 540fps and a 1322 pistol with a 14" barrel shooting around 500fps.

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PostPosted: Mon Aug 22, 2016 8:25 am Reply with quote
2240man
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Thanks! Looks like I'd be losing power in the .22 gun. Is there any way to boost power on a 1377-.22 platform? I am familiar with valve mods, hammer springs, power adjusters etc., but have never worked with Multi pump systems before. Do all the same mods for co2 apply to pump?

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PostPosted: Tue Aug 23, 2016 7:22 pm Reply with quote
AirGunEric
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Mostly- but valve modifications on the 22xx and 13xx guns are waste of time unless using 24" .22 caliber barrels- Co2 or pump.

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PostPosted: Tue Aug 23, 2016 7:26 pm Reply with quote
2240man
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AirGunEric wrote:
Mostly- but valve modifications on the 22xx and 13xx guns are waste of time unless using 24" .22 caliber barrels- Co2 or pump.


Are you sure? I do have a 14 inch barrel on it.

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PostPosted: Wed Aug 24, 2016 4:01 am Reply with quote
AirGunEric
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If you have US-spec guns (not 'detuned' for different export markets), then yes, I am sure)- the only valve modification that gains you anything is on the pump guns (13xx) is a flat top piston/valve combination, anything else related to the valve is a waste of time if not using a 24" barrel.

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PostPosted: Wed Aug 24, 2016 7:31 am Reply with quote
2240man
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I see... I do have us spec. That's good to know. Now I won't be tempted to ruin my valve.

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2240 to 1377 conversion 
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