THIS has a diana barrel 25 caliber 17 inches. PEAK is 740 with 24.7 grain or just about 30fpe. 5 useful shots from 3050 psi down to 1000 psi. The band is simply a crosman band bored out, If you wanted to upgrade the breech, you would need to do additional turning (you would need a lathe). Nylon custom poppet, upgraded hammer spring, extended one off probe as seen in the picture along with basic handle, front sight is a diana which matches the rear sights height. Front of barrel is threaded m10-1.0, so any chaser or sumatra ldc will fit. Ask questions, im sure im forgetting something. This item is in the category "Sporting Goods\Outdoor Sports\Air Guns & Slingshots\Air Rifles". The seller is "valymurph_0" and is located in this country: US. This item can be shipped to United States.