7.5MM diameter/273mm length inner tube

Used for M249-MK1/MK2/PARA/MK46/M249K(S) gel blaster

Used for M249-MK1/MK2/PARA/MK46/M249K(S) gel blaster

Used for PKM(S)/PKM-W(S) gel blaster

Used for M60(S)/MK43 gel blaster

7.5MM diameter/370mm length inner tube