Heres a few pics of my clones, not exactly correct due to the US regs on importing parts.
I am not a Colt expert, some info may be wrong!
Colt AR-15
( this one is the civilian model SP1)
Colt Model # 602 (601's had 1:14" twist)
Prior to 1965
No : Forward Assist nor Case Deflector
Slab Side Lower
(no re-enforcing ribs by mag catch)
Butt stock with no cleaning kit trap door & sling swivel on a stud.
3 Prong Flash Hider
XM16E1 (M16A1)
Colt Model # 603
1965 ish
Forward Assist but no case deflector
A1 Bird Cage Flash Hider, fluted 360`
(Looks similar to an A2 Hider but, A2's have a solid bottom to prevent dust blow up)
This one should also have the striaght Delta Ring, I have one just waiting for tools to get here to change it.
Lower should only have the top horizontal re-enforcing rib, not the vertical one & the small dia. horizontal one by the mag catch.
Also should not have the "FIRE" "SAFE" stamped on the side.
(I used a Bushmaster lower as that's what I had)
Also no cleaning kit trap door in butt & should have sling swivel on a stud.
Heres a pic of an A1 (forward assist) & SP1 upper
I am now building 2 early Carbines
I haven't decided on which one of these I will build.
I now have all the parts just need time to put together.
I am prob going to build this one useing a SP1 lower/upper.
CAR-15 SMG
Colt Model # XM607
10" barrel
3.5" solid moderator (flash hider)
No bayonet lug
Short Triangle Handgaurds
No Forward Assist nor case deflector
Slab Side lower
telescopic 7" butt stock
No pics yet, similar to the pics below.
or may built this
CAR - 15 SMG
Colt Model # 607A
10" barrel
3.5" moderator
no bayonet lug
Short Triangle Handgaurds
Forward Assist but no case deflector
7" telescopic butt stock
In this pic you can see the correct re-enforcing rib on the lower.
(You can modify a newer lower by grinding off the other 2 ribs & re-finishing the lower)
butt extended
Also going to build one of these for my kid.
I have the parts but no time to put together.
It should look like this.
XM177
Colt Model 610
10" barrel
5" slotted moderator with Grenade launcher Ring
No bayonet lug
Short ribbed round handgaurds
No forward assist nor case deflector
2 position aluminum telescopic butt stock
(may build a XM177E1 - Colt Model 609, same specs, but has a case deflector)
I have also noticed that not all early M16s had the Tear Drop Forward Assists. I have seen some original pics with them having the Round Forward Assist button.
Also the Vietnam era M16s should all have the Triangle Charge Handle.
I'll post pics as soon as I can re-weld my de-milled ones.