BudsGunShop.com - rugger ar556
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riser size?
2 Answers
Trophy TRS-25 Red Dot Sight 1x25mm 3MOA Reticle Matte Black
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For the AR platform, you will want to get either a 40 mm riser (which will provide 1/3 co witness, meaning the sights would sit in the bottom 1/3 of the optic picture) or a 37 mm riser (which will provide 1/2 or "Absolute co-witness", meaning the sight will sit in the bottom 1/2 of the optic picture).