This adjustable spanner wrench is a great add to your cart for your SDTA mounts to tighten them (mount in photo not included).
Radian Weapons Accessories
Radian Charging Handle SD
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Anyone know what kind of tool fits the SD tactical end caps? : r/NFA
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ADJUSTABLE HOOK SPANNER WRENCH - O 885
Radian Raptor Charging Handle NP3 556 on Sale