I have found a ton of articles online that give parts of the spec, but does anyone have a copy of, or have a link to the actual spec. Our company wants to make our version of MIL SPEC 5.56 for possible local govt purchase and we need to know everything. Velocity, Pressures, the whole nine yards.

What you need is a copy of:
TM 43-001-27
Army Ammunitin Data Sheets, Small Caliber Ammunition.
Chapter 10 should be 5.56 ammo.

TM 43-0001-27
CARTRIDGE, 5.56MM, BALL, M193
Type Classification:
STD - AMCTC 5143.
Use:
Rifles, 5.56mm, M16 and M16A1. The cartridge is
intended for use against personnel and unarmored
targets.
Description:
BALL Cartridge. The cartridge is identified by a plain
bullet tip.
Tabulated Data:
DODAC...............................1305-A066
UNO serial number ............0012
UNO proper shipping
name ...............................Cartridges for
weapons, inert projectile
Weight ................................182 gr
Length.................................2.26 in. (57.4 mm)
Tracer .................................NA
Primer.................................Percussion
Fuze....................................NA
Explosive:
Type ...............................NA
Weight ............................NA
Incendiary:
Type - ..............................NA
Weight ............................. NA
Propellant:
Type ...............................WC 844 or
CMR 170
Weight .............................28.5 or 26.5 gr
Projectile:
Weight .............................56 gr
Performance:
Chamber pressure...............52,000 psi
Velocity ..............................3250 fps, 15 ft from
muzzle
Shipping and Storage Data:
Quantity-distance class/
SCG ................................1.4S
Storage code ......................Class V
10-3

Actually, here it is:

http://www.dtic.mil/dticasd/sbir/sbir032/a044a.pdf

Page 10-3.