It's a .177 caliber single shot Chinese Ak trainer.. a BAM XS B3-1 near as I can find out, it's an assault pellet gun.
It weighs 6 1/2 - 7 pounds and has a fixed 15 1/2 inch rifled barrel, spring operated, there is a cocking lever on the right side, unlatch it, pull it rearward fully, and push forward to relatch. It's made by Xisico in China, some have said it's Factory 971, and yes, parts and rebuilt components are available on line believe it
XISICO stands for Xin Su Industrial Corporation, also known as 'Factory #971', arms manufacturer in China, known abroad mainly for its line of spring piston and PCP air rifles, accessories and ammunition. In the US, it is represented by Huston, TX based company - Xisico USA, Inc.http://www.xisico.com/
Some further info..http://www.bghi.us/index.php?x=b3
Chamber and loading port
The only stamps on it, the factory stamp and a serial number......import mark, nah
It''s NOT a firearm