I'm building another 9mm AR type carbine, and decided to spend a little extra time on some mods.
1st.... the offerings of 1/2x36tpi muzzle devices sucks.
Not that a 9mm carbine needs help with recoil, but I wanted something different on the end.
The 9mm barrel I have is using 1/2x36 muzzle thread. So.....
I had an A2 style flash hider laying around that is 1/2x36, so let's make it different and unique.
Used the TIG to fill in 3 of the openings around the top, leaving the side cuts open.
I enlarged the side cuts, added a thick washer on the end, and ran a bead around it with the TIG. Then I smoothed the welds out.
It will be sandblasted and get some kind of coating this week.

Next was the lower.
The 9mm lowers for colt mags have a big hunk of unused area on the front of the magwell.
I figured I could lighten it up with a few end mill reliefs.
The cuts get slightly deeper as they drop down the magwell creating a slightly angled look.
I may go a little deeper on the cuts, or add a bigger radius to the corners....or not.
The top lower is an unmodified one.....the bottom is the cut one.
1st.... the offerings of 1/2x36tpi muzzle devices sucks.
Not that a 9mm carbine needs help with recoil, but I wanted something different on the end.
The 9mm barrel I have is using 1/2x36 muzzle thread. So.....
I had an A2 style flash hider laying around that is 1/2x36, so let's make it different and unique.
Used the TIG to fill in 3 of the openings around the top, leaving the side cuts open.
I enlarged the side cuts, added a thick washer on the end, and ran a bead around it with the TIG. Then I smoothed the welds out.
It will be sandblasted and get some kind of coating this week.
Next was the lower.
The 9mm lowers for colt mags have a big hunk of unused area on the front of the magwell.
I figured I could lighten it up with a few end mill reliefs.
The cuts get slightly deeper as they drop down the magwell creating a slightly angled look.
I may go a little deeper on the cuts, or add a bigger radius to the corners....or not.
The top lower is an unmodified one.....the bottom is the cut one.

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