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The new HS507C Micro Red Dot System from Holosun is a pistol-sized optic with an open frame for a great sight picture, clear glass and a rugged 7075 aluminum housing. It is powered by a CR2032 battery and Holosun's innovative Solar Fail-safe back up. The HS507C will run up to 10 years on a single battery on setting 6, dot only. Featuring Holosun's Multi-reticle system, the HS507C allows the operator to switch the reticle between a 32 MOA circle with 2 MOA dot, a 2 MOA dot only, or a 32 MOA ring only, all at the push of a button. Better yet, the same LED projects all three reticles, so no re-zeroing is necessary. It comes equipped with Holosun's Shake Awake technology with last setting recall. This optic has our features in one tough, small package.