Superior field of vision offers an unobstructed view in critical situations where vision is essential

The upper half of the block inserts into the AR10 receiver just like a bolt carrier group

Premium Material for Enhanced Durability

adjustable strap design

it's a reliable companion built to excel in various tasks

Hydro Flask 44 oz Wide Mouth with Flex Straw Cap Weapon Retention Superior field of vision offersHydro Flask 44 oz Wide Mouth with Flex Straw Cap A 40 oz Wide Mouth water bottle with our leakproof Flex Straw Capeasy to fill, easy to drink. Open it up, add your ice, and flip to sip. The insulated stainless steel keeps it cold for up to 24 hours. 24 hours cold TempShield double wall vacuum insulation Leakproof when closed Pure taste with no flavor transfer Wide Mouth opening is ice cube friendly Bottle fits most backcountry water filters BPA Free