Masada (Magpul) Outer-barrel locking plunger
Item No.: 1306
US$7
Masada (Magpul) Hop-up Adjustor Kit
Item No.: 1305
US$9
Masada (Magpul) Hop-up Chamber, air-tight nozzle and hop up bucking
Item No.: 1303
US$44
Bearing Spring Guide, open-butt gear box (e.g. Umarex, Magpul, etc.)
Item No.: 1204
US$10
Hop up rivet
Item No.: 1110
US$3
Hop up bucking and rivet
Item No.: 1109
US$8