Sightmark 5x Tactical Magnifier f1 It shares the same spring

It shares the same spring as the Fusion Engine™ with both light and heavy spring options available to adjust the loading force

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Realistic Full Blowback

Description: Echo-1 Tactical Sling Adapter For Ar Series

Sightmark 5x Tactical Magnifier f1 It shares the same springDescription: Sight Mark 5x Tactical Magnifier Specifications: increases magnification of accompanying sights for greater sighting range improved target recognition, especially at medium range distances eotech and aimpoint compatible precision accuracy wide field of view quick target acquisition multi coated optics waterproof, fog proof, shockproof, lightweight Made of high grade Aluminum Has a Slide to Side Quick detach mount 5 x Magnification