This is an AR-15 papercraft, the third iteration of a long project that has undergone several stages.
It is fairly detailed and takes a lot of paper, so you have to build it gradually and piece-by-piece. A classic M4 configuration, for example, would be 27 pages.
There are a couple of different styles for stocks, handguards, etc, and most things are available in black, tan, colorless, and sometimes gray versions. There are flattop and A1 upper receivers, as well as different barrel lengths. If yo want to build a longer barrel, note that there is no proper M16 handguard, although putting two carbine-length RIS handguards makes a rifle-length one.
The package is rather lightweight because I've omitted most of the V1 and V2 parts. The furniture and sights that haven't been replaced are still included though, so there are still a couple of hand-drawn pages.6-17-14 Re-Released package with new parts included and some improved pages.
Newer parts (or improved versions) not included in older package (although all of them are included in the new package, with the exception of the 416 lower):Magazine Pack
(20 & 30rd USGI mags, plus windowed and windowless PMAGs, and instructions)Triangular Front Sight
(digitized and with seams covered, and instructions)Low-Profile Folding Rear Sight
(digitized, new attachment mechanism, and instructions)416 Lower Receiver
(reduced magwell angle, Hk selector, improved rear ring, and instructions)V3-1 Delta Ring
(Elongated, adding contact area with the upper receiver for improved durability)Holo Sight
(EOTech 551, in black, tan, or white)Vertical and Stubby Grip
Specific builds (all the parts to build a particular configuration, and nothing extra)M16A4
(20" barrel, solid stock, carry handle or Aimpoint) (black)Carbine w/ RIS, CTR, and flip-up sights
(As pictured, except with a 14.5" barrel and an optional Angled Foregrip) (black and tan variants included)Same as previous
(Except with the V3-1 Delta Ring, and all PNG's with no PDF) (tan variant only)
1. What kind of paper does this use?
Letter or A4 size. Scale to printable area (don't try to print them at original image size, because they won't match).
2. What are the changes in the re-release?
Folders are reorganized and some new finished build pictures have been added.
Resolutions and colors have been adjusted slightly on multiple parts. Tan parts are generally a bit darker and redder.
Black barrels have been added, and the delta ring is replaced with the V3-1 improved delta ring.
The V1 vertical foregrip has been replaced with a new vertical grip and a stubby variant.
The black lower receiver has its gray parts darkened so they don't stand out as much.
The magazines have been replaced with updated versions (including a 20rd mag), and polymer mags have also been included.
A holographic sight has been added.
The folding rear sight and the triangular front sight have been replaced with digitized versions.
The CTR stock's buffer tube is now black (although a gray buffer tube is still available for the tan version).
The tan M16 stock is properly tan instead of yellow.
Some of the older, handmade parts, are still included, just in their own separate folder.
Some black, gray, and white parts have been converted to grayscale to reduce filesize.
3. Where does X go?
If the notes files and construction photos aren't clear enough, just ask here and I'll explain. However, make sure you look at the photos first, since a picture is better than a written description.