Primary Arms SLx 5x MicroPrism Rifle Scope - ACSS Aurora Reticle - This Primary Arms MicroPrism is part of the SLx optics line. SLx optics have built a reputation for innovation, reliability, and value. All SLx optics undergo rigorous field-testing during development to best serve you in any environment. For precision without compromise, the SLx 5x MicroPrism brings an extended range to this lightweight, ultra-compact design. Weighing only 8.5oz with a 3.31" overall length, the SLx 5x MicroPrism is comparable to many red dot sights, though its crystal-clear glass and 5x magnification offer improved precision at even longer distance than the 3x variant. Even in close-quarters, the optic's wide field-of-view and forgiving eye relief make it easy to snap on target. Because the SLx 5x MicroPrism uses an etched reticle with adjustable diopter, the user will always have a clear, crisp reticle image, even if they have severe astigmatism. When set to max illumination, the MicroPrism reticle is fully Daylight Bright. For low-light, this optic offers 3 different NV-compatible settings, accommodating any ambient light level. Paired with the AutoLive motion-sensing illumination technology, this optic provides an exceptionally long runtime at any brightness setting. Features: Compatible with MR12 12 O'Clock Mini Reflex Mount Compatible with MDOM Offset Micro Dot Mount Black anodized finish 13 Illumination settings + 3 NightVision; Highest settings are Daylight Bright AutoLive motion-sensing on/off battery saving technology Length: 3.31" Weight: 8.5 oz.