Pump Handle

[quickster47 †]

I think the air tube on the 1377 guns is 5/8" or .625".

Carl

[eric]

3/4"

[Nightsniper52]

Just measured my 1322 its .750.    Looked up the latest blue print for both models and its the same part # for both 1377/1322    Thanks for checking!!

[JEBert]

I have two 1377's.  I got out the calipers and both of them measure .753 at tht breech plug, .753 in the middle near the front trigger frame screw, and .758 around the pump pin.  All measurements take from one side of the guns to the other because the barrels and breeches are on and I didn't want to take them off.
Cheers,

[0351_Vet]

.753 ......Okay 3/4"                   

[Nightsniper52]