I'll make it brief:
InformationSound/firing rate exampleIf anyone has the skills to make something like this, it'd be much appreciated.
EDIT: I have someone working on it. Preview:
IMPORTANT EDIT (12/12/11): Before you say "Re-skin an M16" and all that, please note some differences:
Modern M16-Semi AND Automatic firing rates
-Combat stock with adjustability
-Colored black/grey
-Medium clip (30 rounds on average)
-Ability to use underslung grenade launcher
-Can also use flashlights, laser sights, scopes, etc.
Vietnam era AR-15 (Serv. Rifle)-Semi-auto firing rate
-Wood stock/handguard/grip finish
-No "combat stock" like the M16
-No waterproof handguard
-Smaller clip (20 rounds)