Models Fedorov Avtomat Bolt 14 102 3 Fedorov Avtomat Barrel 17 107 0 HK MP5 Bolt Rollers 20 195 0 HK MP5 Recoil Guide Rod Assembly 20 204 0 HK MP5 Firing Pin 26 260 1 HK MP5 Bolt Carrier Sections 36 332 11