ICS M16 series gearbox locking pin. Actual item may differ slightly from the above picture.

Replacement Upper Receiver for ICS series PCR-97 M4 and M16 style rifles.  Color charcoal grey for pre-2008 model M4's.

Echo 1 locking receiver pins for M4 and M16 style airsoft guns.  If you keep losing your standard receiver pins because they won't stop falling out, this is your answer.  Treaded screw head locks the pin in place and keeps it from falling out!

Package consists of one high quality die-cast aluminum metal body, with ejection port cover, metal hop-up set, hop-up rubber, receiver pin set and forward assist knob.

HurricanE flat top metal body for the M4 style AEG's.

Did your ICS PCR series rifle run into trouble, or perhaps a tree?  ICS has the part you're looking for.  The replacement lower metal receiver body.  Colored black for 2007 and 2008 models.

ICS replacement rear receiver pin for all ICS Car-97 M4/M16 style rifles.

ICS Version 3.4 metal receiver for MP5 series airsoft AEGs. Works well with all ICS and Tokyo Marui AEGs.

ICS SEF style MP5 original lower receiver.

Systema's M4A1 metal receiver kit includes everything you'll need to make your receiver all metal. The kit includes a reinforced hop-up unit, ejection port door and part, and an all-metal simulated forward assist.