(Disclaimer: do not do this. It is for entertainment purposes only)
I grabbed a 1” rod 1.124” diameter of 303 stainless and threw it in the lathe.
I’m basically going to copy the dimensions of a stock aluminum buffer housing and make one out of stainless to gain the weight I need to hit 6.5oz.
Use a dial indicator and adjust until you have 0.000 run out.
face off and run a quick pass to get everything true.
1/2 drill center to depth ~2.600. Diameter of .565 image|666x500
bore to dimension and use a reamer for a smooth bore!
Now check with a buffer weight on a magnet to insure that everything will work.
Start making your cuts. When getting close to final diameter make sure you cool the part to room temp before measuring.
I’m going to not cut a shoulder yet to be sure I have enough weight.
When parting the buffer from the rod stock use a lot of cutting oil and go slow. I was turning at 40 RPMs.
Now to clean up the face of the buffer. Wrap tap around your part to save the finish.
Now to make a buffer bumper.
here is what a pre made bumper looks like.
I’m using a chunk of 3/4” polyurethane for the bumper.
chucked up a piece of .625 dia steel in the lathe. Faced it and ran a quick cut.
center drill. 9/16 drill. .500 depth. ![image|666x500]
now this is razor sharp so be careful. Heat up with heat gun and push polyurethane half way up.
cut and remove bottom piece.
For shaping grab a piece of steel and heat it up.
heat and roll at an angle till desired shape.
now that that is done let’s make the rubber weight spacers.
grabbed a chunk of rubber mat.
1/2” I.D. Punch. Make 3 of them.
Trim to proper thickness ~.075”
as much as I want to go over making a roll pin I believe that it’s pretty self explanatory.
Now let’s see what weight we are at with our parts. Remember we are shooting for 6.5oz!
the buffer body alone is 3.625oz!
with all other parts on the scale we are at 6.625oz!!! This is with 2 steel weights and 1 tungsten weight. Before we go further let’s drill the bumper holes.
here is the set up. A little cringe factor with the c-clamp.
1/8” carbide 4flute end mill makes short work of it.
beautiful. Now deber the I.D. And O.D.
tape up your buffer and re chuck to cut a shoulder. Re zero out to 0.000 run out.
still looks good.
to the scale once again!
now just the body is at 3.125oz so we lost some good weight.
now with all of our parts we are at 6.5oz!!!
according to heavybuffer.com
this is our target weight for a sig 716 unsupressed.
Remember be safe and have fun!