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SIG MCX VIRTUS 1/2X20 Adapter
from $35.00
Note: Remove the factory thread adapter and measure for the proper thread size. (If the thread size is smaller than 9.6 mm in diameter you will need the version 1.5 adapter)
You have to remove the factory threads first. The factory thread has two flat sides where they can use a wrench to turn it counterclockwise to remove. Then add on the DonnyFL adapter.
Features:
Compatible with .177 and .22
6061 Aluminum T6
1/2 x 20 male threads

SIG MPX 1/2 x 20 Adapter A52
$35.00
Features:
Made by CNC for accuracy
Material is 6061 T6 Aluminum
Black anodize
Diamond pattern knurling for easy grip