Eventually, I had to consult a gunsmith who advised me to crank the torque on up over 80 lbs the gun would be okay. The mil-spec 'sprocket' style barrel nut I had overnighted refused to line up appropriately, so the gas tube wouldn't be out of alignment. It was a 'batteries not included' level of frustration. I had to get the rail to figure out it didn't come with a barrel nut. I think most of the aftermarket ar rail system manufacturers have their proprietary barrel nut, which usually aids in installation. My prior experience is with an Odin Works 15.5' Keymod rail, and they have their proprietary barrel nut, which is remarkably smart for lining up the gas tube. My four-star rating is entire because of this issue. What they are forgetting is the guy building an AR from scratch. They are assuming you have a standard Mil-Spec barrel nut already installed on the barrel. The assumption is that you already have a MOE or Mil-Spec type hand-guard. This being said, Samson manufacturing has made one assumption, which I think is a weak point in the installation process. The video listed on this page with the product is an excellent tutorial on how to get it fixed. It's a solid fantastic keymod rail system you can't complain after you've got it properly installed. Buy with confidence that we stand behind the product we sell. At MSP, we only offer AR accessories from the most trusted brands like Samson Manufacturing. The distinction between inferior quality and premium AR-15 Handguard is undeniable. Finish: Black MIL-A-8625 type III class 2 anodizing.Rail includes integrated anti-rotation tabs.Thermal bushings clip to any Mil-spec barrel nut.Does NOT include a barrel nut (compatible with any MIL-SPEC barrel nut). KeyMod versions of the Evolution Series do not include accessory rails. Accessory picatinny rails can be added or removed at any of 7 positions around the rail and any place along the length of the tube. Being lightweight and durable allows the Samson Evolution Series to offer the perfect upgrade for 3-Gun competition shooting, law enforcement and military personnel or weekend enthusiasts. The Samson Evolution Series features a free-floating AR-15 rail system. Samson Evolution Series Keymod Rail System - AR-15 Handguard Binoculars, Monoculars & Spotting Scopes.

Ar keymod accessories