I have a 2240 that I bought a few months ago, I wanted a light weight rifle that I could shoot in my basement or in my back yard range (about 40 yds.) that was easy to shoot, didn't require a heavy cocking stroke like my break barrel air rifles and didn't have the high velocity of my break barrel air guns for use in my basement.
I had settled on the QB-78 Co2 rifle, but they weren't available in .22 cal. at the time that I was ready to buy, so I purchased a Crossman 2240 along with a shoulder stock, the result was a an extremely accurate light carbine with just enough velocity (about 500 fps. with 14.3 gr. pellets generating close to 8 FPE) to be flat shooting up about 40+ yds., It shot great right out of the box and didn't appear to require the type of break in period that I experienced with my break barrel rifles.
I was so impressed with the 2240's performance that I opted to scope it with a 2x7x32 AO Hawk scope, the scope really brought home the fact that while the pistol is capable of great accuracy way above it's price point the factory sights are crude at best, and hinder the guns potential, I then added a steel breech kit and a Crossman 14-1/2" barrel, and padded the comb on the shoulder stock which raised the comb just enough to perfectly align my eyes with the scope and gives me a good cheek weld.
I've kept the pistol/carbine bone stock internally save for lightening up the trigger pull a bit, I haven't tested it for velocity as yet but I believe that the longer barrel has increased to velocity a bit, the lightened trigger pull and scope in combination with the steadiness of the shoulder stock has added greatly to the accuracy of the gun.
I've been so impressed with the 2240 as I have set it up that I have pre ordered the the new Crossman 1322 Drifter kit pneumatic pump pistol as well, hope this helps.
