MAKING REPLACEMENT WIPES
The best suggested practice for replacing the wipes in your Aurora II is to send it in to Gemtech. For $30, they’ll put in brand-new factory wipes, grease it up properly, and send it on back. However, if you’re a type 02/07 Special Occupational Taxpayer (SOT) FFL, you can legally make new wipes without any questions or hassle. Legal stuff aside and without further ado:
TOOLS & MATERIALS
15 ⁄16- inch hammer driven arch punch (McMaster-Carr #3427A23)
Petroleum jelly (premium synthetic grease is a viable, yet unpreferred, alternative)
12x12-inch sheet of 1 ⁄ 8- inch-thick polyurethane (PU) rubber, 80A hardness (McMaster Carr #8789K21); enough for well over 100 wipes, but you can buy in any quantity
OEM Gemtech wipes are water-jet cut. However, these instructions closely follow Gemtech-founder Dr. Phil Dater’s instructions for original Aurora wipes.
You also have some options regarding tools and materials. For example, the PU hardness for OEM wipes is 85A, which we found more difficult to source. The 80A is an easy alternative with only slightly reduced longevity.
Additionally, if you already have a 1-inch arch punch (McMaster-Carr # 3427A24) that’ll also work — but you’ll need to use a dowel to press fit. Both sizes are equally as effective. Another optional tool is a sharp ½-inch cold chisel (McMaster-Carr #3575A22) in lieu of a craft knife; while it isn’t more effective, it does look nicer. Neatness doesn’t count terribly much here in regards to performance though.
2. Using your BFH and arch punch, cut eight wipes from your PU. A cutting board makes this job easier and will also keep your punch sharp for a longer period of time. 2
1. Disassemble the Aurora II. Destroy and dispose of spent wipes. Clean spacers if needed (being a little dir ty is no problem). 1
3. Use your craft knife (or ½-inch cold chisel) to cut an “X” through the center of the wipes. Pair each wipe with another, using a dab of petroleum jelly to stick them together. Each cut “X” should be offset 45 degrees from one another. 3
4. Pack the outside and inside channels of your spacers with the petroleum jelly. Also apply jelly to the top and bottom of each spacer for the best seal with the wipes. 4
WARNING! The BATFE has notified manufacturers that suppressors and suppressor parts, including suppressor wipes, are federally regulated devices and can only be manufactured by specially licensed firearms manufacturers.
6. If you’ve used a 1-inch arch punch rather than a 15/16th, use a dowel to press fit. Replace the front cap and enjoy! 6
5. Assemble the silencer. The guts consist of eight wipes stacked together in four pairs, with three spacers. The order of assembly is wipes-spacer-wipes-spacerwipes-spacer-wipes. 5