Post by Gingerbread Man on Dec 7, 2013 18:36:16 GMT
www.guns.com/2013/12/06/bolt-together-ar-15-lower-receiver-3d-printer-necessary/
Absolutely awesome.
This kick-ass free-to-use pattern (.pdf) for making your own screw-together AR-15 lower receiver from sheets of aluminum of varying thickness has been making the rounds again what with the recent passage of anti 3D-printed gun laws. The original website is sadly gone.
All you need to do is cut them out and screw them all together, then drill and tap a couple of holes. Guess which one can be shot more?
Might have some problems with some aftermarket mags, though. Might want to consider trimming that magwell a bit should you try this yourself.
[Weaponeer.net]
www.weaponeer.net/forum/uploads/Weaponeer/files/2007-10-17_131429_AR_15_Scratch_Built_Receiver.pdf <<<Copy/Pasta to browser.
Readme for Scratchbuilt AR15 Receiver
Blueprints
By
elmgrove1765@yahoo.com
1. Release Dates
June 2002: Scratchbuilt AR15 receiver project completed and test fired
Oct 2002-Mar 2003: Incremental release of readme.txt and all 11 parts
blueprints:
sideleft_rev_A.pdf - rxvr left side plate
sideright_rev_A.pdf -
rxvr right side plate
fcwell_rev_A.pdf - fire control well bottom
magfront_rev_A.pdf - magazine well front
magleft_rev_A.pdf - magazine well left side plate
magright_rev_A.pdf - magaz
ine well right side plate
magback_rev_A.pdf - magazine well back
buffer_rev_A.pdf - buffer tube part
bufferstop_rev_A.pdf - buffer retainer rod
grip_rev_A.pdf - grip part
tguard_rev_A.pdf - trigger guard
Mar 2003: Admin of “ Photos and Blueprints” forum of
www.roderuscustom.tzo.com
combined all files into a single .pdf document
with bookmarks.
24 Mar 2003: Updated two blueprints due to email feedback from users
Receiver left side plate (rev. B) - added missing
'X' positions of trigger/hammer pin holes,
suppressed hidden lines on one sheet for clarity
Receiver right side plate (rev. B) - added mi
ssing 'X' positions of trigger/hammer pin
holes, suppressed hidden lines on one sheet for clarity
24 Apr 2003: Updated two blueprints due to additional email feedback
from users
Receiver right side plate (rev. C) - added missi
ng 'Y' position of mag. release button hole
Grip (rev. B) - added missing dimensions to locate 30 deg. angle for pistol grip
N
ot
e: "left" and "right" refer to the user's point of
view when the rifle is held in the normal firing
position.
2. Links
For more information or photos please see:
Webpage:
www.geocities.com/elmgrove1765
(See link for "P6: AR15 receiver")
Photo albums:
community.webshots.com/user/user_556
3. Decimal inch cross reference
All blueprint dimensions are in
decimal inches. Here are some of the less common decimal inch
equivalents that were used during machining
(for drill sizes, end mill diameters, etc.)
0.0890" -> use #43 (drill size)
0.1065" -> use #36 (drill size)
0.1094" -> use 7/64"
0.1360" -> use #29 (drill size)
0.1563" -> use 5/32" (radius of 5/16" diameter)
0.2031" -> use 13/64"
0.2130" -> use #3 (drill size)
4. Notes
1) Every effort has been made to ensure the plans
are correct, but in the unlikely event there is
an error or if you have any suggestions, please em
ail the author. Note that the author assumes
no liability for any adverse consequences resulting
from the construction
or use of this AR15
receiver. Please obey all laws.
2) If you use 1/8" plate stock for the side plates,
note that the actual thi
ckness of the plate may
have a tolerance of .005" or more. The actual th
ickness is not critical as long as the flats
machined at the end of the receiver si
de plates has a thickness of 0.104" (
see
Receiver -
Left Side S
heet 3
and
Receiver - Right Side
Sheet 5
)
3) The only holes that should be reamed to the
final diameter are the trigger and hammer pin
holes – the other holes can be drilled normally. T
he "Colt Redraw Blueprints" by D. Snider (the
most common one available on WWW) show the ha
mmer and trigger pin holes as .1560 +/-.0015
in diameter. The blueprints show that the rece
iver was built using hammer/trigger pin holes of
.15625" (5/32") which is a standard reamer size.
This slight difference has not proven to be a
problem in practice.
4) The "Colt Redraw Blueprints" by
D. Snider show the magazine release button hole with a width
(narrower dimension) of .318". I measured severa
l magazine release buttons, and the max. size I
found was 0.3" wide. Since a .318" endmill is an
unusual size, the blueprints show that the
receiver was built using a magazine release
button width of 5/16"
(.3125") - a standard end mill
diameter. There is still more than enough slack
so that the magazine release button moves
easily.
5) The fire control well bottom has a thickness of 0.125" (
see
Fire Control Well
). I got a bit
lazy and used 1/8" aluminum plate “as is” without
machining it to the correct thickness. The
thickness of the part turned out to be 0.120" - a
bit off, but still acceptable since the depth of the
fire control well has a tolerance of .
010" (as shown in D. Snider's print)
6) Although there is a copyright notice on the
blueprints, everyone has permission to download or
distribute as many copies as they want. I put t
he notice on the blueprints just to claim authorship.
*grin* The design is in the public domain, so feel
free to build it (subject to local laws, of course)
7
) Ignore the revision label on each sheet (not updated). The correct print revision is in the bookmarks
.
Absolutely awesome.
This kick-ass free-to-use pattern (.pdf) for making your own screw-together AR-15 lower receiver from sheets of aluminum of varying thickness has been making the rounds again what with the recent passage of anti 3D-printed gun laws. The original website is sadly gone.
All you need to do is cut them out and screw them all together, then drill and tap a couple of holes. Guess which one can be shot more?
Might have some problems with some aftermarket mags, though. Might want to consider trimming that magwell a bit should you try this yourself.
[Weaponeer.net]
www.weaponeer.net/forum/uploads/Weaponeer/files/2007-10-17_131429_AR_15_Scratch_Built_Receiver.pdf <<<Copy/Pasta to browser.
Readme for Scratchbuilt AR15 Receiver
Blueprints
By
elmgrove1765@yahoo.com
1. Release Dates
June 2002: Scratchbuilt AR15 receiver project completed and test fired
Oct 2002-Mar 2003: Incremental release of readme.txt and all 11 parts
blueprints:
sideleft_rev_A.pdf - rxvr left side plate
sideright_rev_A.pdf -
rxvr right side plate
fcwell_rev_A.pdf - fire control well bottom
magfront_rev_A.pdf - magazine well front
magleft_rev_A.pdf - magazine well left side plate
magright_rev_A.pdf - magaz
ine well right side plate
magback_rev_A.pdf - magazine well back
buffer_rev_A.pdf - buffer tube part
bufferstop_rev_A.pdf - buffer retainer rod
grip_rev_A.pdf - grip part
tguard_rev_A.pdf - trigger guard
Mar 2003: Admin of “ Photos and Blueprints” forum of
www.roderuscustom.tzo.com
combined all files into a single .pdf document
with bookmarks.
24 Mar 2003: Updated two blueprints due to email feedback from users
Receiver left side plate (rev. B) - added missing
'X' positions of trigger/hammer pin holes,
suppressed hidden lines on one sheet for clarity
Receiver right side plate (rev. B) - added mi
ssing 'X' positions of trigger/hammer pin
holes, suppressed hidden lines on one sheet for clarity
24 Apr 2003: Updated two blueprints due to additional email feedback
from users
Receiver right side plate (rev. C) - added missi
ng 'Y' position of mag. release button hole
Grip (rev. B) - added missing dimensions to locate 30 deg. angle for pistol grip
N
ot
e: "left" and "right" refer to the user's point of
view when the rifle is held in the normal firing
position.
2. Links
For more information or photos please see:
Webpage:
www.geocities.com/elmgrove1765
(See link for "P6: AR15 receiver")
Photo albums:
community.webshots.com/user/user_556
3. Decimal inch cross reference
All blueprint dimensions are in
decimal inches. Here are some of the less common decimal inch
equivalents that were used during machining
(for drill sizes, end mill diameters, etc.)
0.0890" -> use #43 (drill size)
0.1065" -> use #36 (drill size)
0.1094" -> use 7/64"
0.1360" -> use #29 (drill size)
0.1563" -> use 5/32" (radius of 5/16" diameter)
0.2031" -> use 13/64"
0.2130" -> use #3 (drill size)
4. Notes
1) Every effort has been made to ensure the plans
are correct, but in the unlikely event there is
an error or if you have any suggestions, please em
ail the author. Note that the author assumes
no liability for any adverse consequences resulting
from the construction
or use of this AR15
receiver. Please obey all laws.
2) If you use 1/8" plate stock for the side plates,
note that the actual thi
ckness of the plate may
have a tolerance of .005" or more. The actual th
ickness is not critical as long as the flats
machined at the end of the receiver si
de plates has a thickness of 0.104" (
see
Receiver -
Left Side S
heet 3
and
Receiver - Right Side
Sheet 5
)
3) The only holes that should be reamed to the
final diameter are the trigger and hammer pin
holes – the other holes can be drilled normally. T
he "Colt Redraw Blueprints" by D. Snider (the
most common one available on WWW) show the ha
mmer and trigger pin holes as .1560 +/-.0015
in diameter. The blueprints show that the rece
iver was built using hammer/trigger pin holes of
.15625" (5/32") which is a standard reamer size.
This slight difference has not proven to be a
problem in practice.
4) The "Colt Redraw Blueprints" by
D. Snider show the magazine release button hole with a width
(narrower dimension) of .318". I measured severa
l magazine release buttons, and the max. size I
found was 0.3" wide. Since a .318" endmill is an
unusual size, the blueprints show that the
receiver was built using a magazine release
button width of 5/16"
(.3125") - a standard end mill
diameter. There is still more than enough slack
so that the magazine release button moves
easily.
5) The fire control well bottom has a thickness of 0.125" (
see
Fire Control Well
). I got a bit
lazy and used 1/8" aluminum plate “as is” without
machining it to the correct thickness. The
thickness of the part turned out to be 0.120" - a
bit off, but still acceptable since the depth of the
fire control well has a tolerance of .
010" (as shown in D. Snider's print)
6) Although there is a copyright notice on the
blueprints, everyone has permission to download or
distribute as many copies as they want. I put t
he notice on the blueprints just to claim authorship.
*grin* The design is in the public domain, so feel
free to build it (subject to local laws, of course)
7
) Ignore the revision label on each sheet (not updated). The correct print revision is in the bookmarks
.
