There you go … picture with labels.

The Marine Corps are currently using the M-16 A2 Service Rifle.

There are three main parts:

1- Upper Receiver

2- Lower Receiver

3- Bolt Carrier Group…

The other parts are (starting from the top heading south):

– Compensator (aka: brim/muzzle) (where the bullet comes out)

– Barrel (the bullet travels through this)

– Handguard (pretty much self explanatory, it’s plastic and has two separate pieces)

– Slip Ring (holds the handguard on… in order to take off the handguard you need to pull down on this) (btw, sometimes this jams)

– Trigger (no need to explain, I hope)

– Carrying handle

+ Within the bolt carrier group…

– Bolt

– Bolt Spring

– Firing Pin

RE:
what are the parts of an M-16 rifle?

i hope it helps… i already forgot the other parts…