Hi I am based in U K and have read the post about poly tube mod on the 1377, I am new to air guns and would like to know what this mod entails, what would it do to the perfomance of the gun,and is there any grapics of this mod has I really have not got a clue what i'm looking for,
I can strip a rebuild a motorcycle so have decent mechanical knowledge, Cheers Guy's

http://www.network54.com/Realm/CFTech/Bioportupdate.htm


http://crosmanairgunmods.blogspot.com/

My Crosman collection: 1377 Carbine, 1377 Pistol, 1322 Pistol, 2240 10M Match Rifle, Crosman Quest 1000x

Thanks mate, What improvement should I expect?