All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
A simple and effective holder to check the spacing from the AR15 gas key and the receiver extension. Use of theBCG to Buffer Space Gauge aka 2 Quarter Tool is documented on many popular blogs and YouTube channels.
I can not find an exact minimum spacing in the Army TM 9-1005-249-23&P Nov 2008. If someone finds it let me know and I will put it in the references.
I like to make things so I came up with this little gem.
It measures 2 quarters / 3.5mm thick and has a few stops to help hold it in place while you are cramming your Bolt Carrier Group back trying to get the gauge.
BCG to Buffer Space Gauge aka 2 Quarter Tool with quarters-0.00
Stops to help hold it:
BCG to Buffer Space Gauge aka 2 Quarter Tool with support stops
Opening to let the BCG slide in:
BCG to Buffer Space Gauge aka 2 Quarter Tool with opening
Showing the gap:
BCG to Buffer Space Gauge aka 2 Quarter Tool in use
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
REF: Army TM 9-1005-319-23&P Nov 2008, Page 0021-10:
Check free length of action spring. RIFLE ONLY: The free length must be between 11 3/4 in. (29.85cm) minimum and 13 1/2 in. (34.29 cm) maximum. CARBINE ONLY: The free length must be between 10 1/16 in. (25.56 cm) minimum and 11 1/4 in. (28.58 cm) maximum. If measurements are notaccurate, replace. Do not attempt to adjust the length by stretching the action spring.
Your manufacture might be different, in making the jig I used the above.
If you have a 3D printer it is a cheap print. This is too long for a standard print bed, I used my Ender Extended 400×400 print surface for this one.
You can download the STL on Thiniverse
To help check the length of your buffer spring I created 2 versions of the AR15 Buffer Spring Measurement Jig; Rifle and Carbine length. The Center is minimum length and the other is maximum length. Your printer might be different so double check measurements after printing.
AR15 Buffer Spring Measurement Jig 01AR15 Buffer Spring Measurement Jig 02
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
A tool to help hold your gas block while you are trying to drive the gas tube pin in or out. It is plastic, if you beat on too hard or too many times it will break. Not to fear! it is a cheap and relatively fast print.
AR15 Gas Block Tool main jig
As an extra bonus, I created a extension tube holder!
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
A quick jig to hold your Glock Trigger for maintenance and / or training. Kinda cool to pull the trigger and see how things work.
Also good if you are doing something like the 25¢ trigger job. See how everything is running before you drop it back in.
A quick jig to hold your Glock Trigger without trigger
I include the white trigger pin file ‘Glock Trigger Jig Pin.stl’. I just use one of the extra pins that come with the back straps for the trigger housing pin. I print it with supports, round part on the bed.
A quick jig to hold your Glock Trigger with trigger
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
This is NOT to check the diameter of your barrel or anything else! Just to check if there is a bulge in your barrel.
Glocks method of checking the barrel is to remove the slide and push it the barrel hole and make sure it does not have a bulge. I wanted something I could use on barrels that are not installed without having to remove a slide.
This example is for 9mm Barrels. I measured several 9mm barrels and slides for Glocks and came up with 0.580 inch for the inner diameter. Because printers vary check before you use.
Barrel bulge checker 9mm 01
Just slide it over your barrel and check for a bulge. PLA is softer than the barrel so there should be no marring.
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
My Present Arms Gunners Mount Kit is awesome. The one thing I wanted different was the Receiver Alignment Block. It does not seem to fit right on non-mil spec buffer tubes I work on. How can they know all the sizes?
You can see the gap here, it will not seat all the way.
You can see the gap here, it will not seat all the way.
And that is because the buffer tube rail is too wide.
And that is because the buffer tube rail is too wide.
So I do what I do and made one. Seats all the way down
So I do what I do and made one. Seats all the way down
And tightly fits the buffer tube rail
And tightly fits the buffer tube rail
The metal rod it ¼ inch and I cut it down to just below the top.
The metal rod it ¼ inch and I cut it down to just below the top.
Then topped it off with a couple of the included caps.
Then topped it off with a couple of the included caps.
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
A sleeve to help hold your castle nut wrench firmly in place while cranking it down on your Present Arms Gunners Mount.
I can not claim this idea as my own, I was watching this video from School of the American Rifle and though “What a great idea”. I did not have any 1 ¼ inch PVC laying around, but I do have a 3D printer and PLA. This is what I came up with for the below wrenches.
Forward Controls:
A sleeve to help hold your castle nut wrench firmly in place Forward ControlsA sleeve to help hold your castle nut wrench firmly in place Forward Controls
Magpul:
A sleeve to help hold your castle nut wrench firmly in place MagpulA sleeve to help hold your castle nut wrench firmly in place Magpul
Wheeler
A sleeve to help hold your castle nut wrench firmly in place Wheeler
Family Shot:
A sleeve to help hold your castle nut wrench firmly in place all 3
Present Arms on all sizes:
A sleeve to help hold your castle nut wrench firmly in place Present Arms
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
I wanted a tool to help get the magazine catch pushed out of my M16/AR-15 without scratching or marring the metal. To compresses the spring and make removal of the magazine catch easier.
Looking around I saw AR Magazine Catch tools similar to mine on various web sites for around $10 without shipping. I am frugal and own a 3D printer, I decided to make one.
I know you can use many other things to push it out, such as, but not limited to, pencil, punch, your kids finger….If you have a 3D printer it is a quick and cheap print.
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
I got the Dry Fire Magazine Glock 19 Gen 5 half moon issue described HERE fixed. I designed and printed a magwell insert to plug the half moon and give me a little flare:
Dry Fire Magazine G19 Gen 5 Magwell Flare Insert
Just slide it in:
Dry Fire Magazine G19 Gen 5 Magwell Just stick it in!
And your DryFireMag (DFM) will slide right in:
Dry Fire Magazine G19 Gen 5 Magwell complete
Safety Check…
Install the mag-well and slide the Dry Fire Magazine in:
All Documents posted on this site are for informational use only. If you make ANY modifications to your Weapons based on this site, you do at your own risk! If done incorrectly, you can render you weapon unsafe and / or unusable.
