Install M4 Carbine Stocks Without Damage
Steel,
dual function wrench lets you easily remove your old extension tube and
install a new-style, A4 stock. Spanner has three lugs to fit the
A4-style castle nut. Provides a non-slip fit so you can correctly torque
the stock to the receiver. Also, the comfortable, rubber coated handle
features a cutout to fit the receiver extension tube to remove the A1 or
A2 stock.
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