Rusan Q-R adapter M52x0.75 for Ø51 mm (ARM52-51)

Rusan Q-R clamping adapter model ARM52-51 for mounting night-vision or thermal devices with an M52x0.75 thread onto the objective bell or exterior of daylight scopes. It provides a quick, adjustable clamp to secure the device to the scope.

Connection thread for the device: M52x0.75; the ARM52-51 designation corresponds to the adapter’s outer diameter for this size. The adapter has an overall length of approximately 48 mm and a clamping length of approximately 37 mm; the clamping adjustment allows a tolerance of ±0.2 mm. Wall thickness was reduced to 2.0 mm in the 2017 redesign to allow mounting with limited space between scope and barrel. Manufactured from aircraft aluminium. Features an adjustable quick-release lever and an internal coating to improve grip and to prevent damage or noise on the mount; it remains secured under strong recoil.

Designed for devices with an M52x0.75 thread. It can be combined with reduction rings to adapt equipment from other brands.

Tests include powerful calibres (.338 Lapua Magnum and .416 TYR). The weight is 0.164 kg (164 g) for the ARM52 adapters.