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Description
This is an AR-15 papercraft, the third iteration of a long project that has undergone several stages.

AR V3A31 M4 Carbine (PNG, 70 MB) Alternative link (Mediafire)
AR V3A31 M4 Carbine (PDF, 31 MB) Alternative link (Mediafire)
Most recent version, includes basic M4 components in multiple colors. Main Page.

AR Accessories (PNG, 62 MB) Alternative link (Mediafire)
AR Accessories (PDF, 31 MB) Alternative link (Mediafire)
Compilation of accessories and parts compatible with this version.

AR V3A416 (Hk416)
Related model, with some degree of compatibility.

FAQs:

1. What kind of paper does this use?

90lbs/185g
Letter or A4 size. Scale to printable area (don't try to print them at original image size, because they won't match).

2. Where is the previous V3 package?

Superseded by the V3A31 package, which improves on it in every way. Together with the accessories package, it include a large number of previous and updated parts.

3. What do the version numbers mean?

V1 & V2: Old versions, both handmade. The receivers, barrels, and magazines are unique and incompatible with anything else. Some accessories like sights can be interchanged with other versions. Handguards are also cross-compatible, because versions 1 through 3 use barrels with the same thick diameter. However, the design quality of versions 1 and 2 is very poor, so I don't recommend building them.

V3A2: Handmade V3 lower receiver that only accepts V2 (undersized) magazines.

V3: Current version, digitalized and generally better build quality, although with some notable weaknesses, such as the barrel and stock. If a receiver is labeled V3A3, that means it takes V3 magazines. However, there are some slight differences in V3 magazines, so some may fit better than others. V3 magwell has a retaining bar at the back that holds the magazine in place.

V3A416: Hk416 that uses V3 receiver measurements and magazine system. As the two-tone build shows, the receivers are cross-compatible. The main difference is the way the stock attaches (rear ring, buffer tube, and stock) and the way the barrel attaches (it goes into the upper receiver). The upper receiver also fits together better, but, being an Hk416 upper, it is taller only matches the Hk416 handguard. Overall, this is a much stronger model, but retains the unrealistic V3 magazine system.

V3A31: Same magwell and receiver dimensions, but improved buffer tube and barrel, and more realistic minor details. In short, it's an application of the lessons learned from the V3A416 model back to the standard M4 carbine configuration.

V4: Hypothetical next version, with realistic proportions and mag release. Although some of the current parts can be considered "V4" parts, I have barely started actually making a V4 receiver. The stock and barrel will attach similarly to the V3A416. There is no estimated release date.

Description
This is an AR-15 papercraft, the third iteration of a long project that has undergone several stages.

AR V3A31 M4 Carbine (PNG, 70 MB) Alternative link (Mediafire)
AR V3A31 M4 Carbine (PDF, 31 MB) Alternative link (Mediafire)
Most recent version, includes basic M4 components in multiple colors. Main Page.

AR Accessories (PNG, 62 MB) Alternative link (Mediafire)
AR Accessories (PDF, 31 MB) Alternative link (Mediafire)
Compilation of accessories and parts compatible with this version.

AR V3A416 (Hk416)
Related model, with some degree of compatibility.

FAQs:

1. What kind of paper does this use?

90lbs/185g
Letter or A4 size. Scale to printable area (don't try to print them at original image size, because they won't match).

2. Where is the previous V3 package?

Superseded by the V3A31 package, which improves on it in every way. Together with the accessories package, it include a large number of previous and updated parts.

3. What do the version numbers mean?

V1 & V2: Old versions, both handmade. The receivers, barrels, and magazines are unique and incompatible with anything else. Some accessories like sights can be interchanged with other versions. Handguards are also cross-compatible, because versions 1 through 3 use barrels with the same thick diameter. However, the design quality of versions 1 and 2 is very poor, so I don't recommend building them.

V3A2: Handmade V3 lower receiver that only accepts V2 (undersized) magazines.

V3: Current version, digitalized and generally better build quality, although with some notable weaknesses, such as the barrel and stock. If a receiver is labeled V3A3, that means it takes V3 magazines. However, there are some slight differences in V3 magazines, so some may fit better than others. V3 magwell has a retaining bar at the back that holds the magazine in place.

V3A416: Hk416 that uses V3 receiver measurements and magazine system. As the two-tone build shows, the receivers are cross-compatible. The main difference is the way the stock attaches (rear ring, buffer tube, and stock) and the way the barrel attaches (it goes into the upper receiver). The upper receiver also fits together better, but, being an Hk416 upper, it is taller only matches the Hk416 handguard. Overall, this is a much stronger model, but retains the unrealistic V3 magazine system.

V3A31: Same magwell and receiver dimensions, but improved buffer tube and barrel, and more realistic minor details. In short, it's an application of the lessons learned from the V3A416 model back to the standard M4 carbine configuration.

V4: Hypothetical next version, with realistic proportions and mag release. Although some of the current parts can be considered "V4" parts, I have barely started actually making a V4 receiver. The stock and barrel will attach similarly to the V3A416. There is no estimated release date.