When I needed to replace my carbine's receiver extension nut BCM was the first company to come to mind. Installation was simple with a perfect fit. This nut torqued up to 40 ft/lbs without any problem or deformation.
The product is great quality and price.
Great product great service
Castle shaped nut, it nuts well, would buy again.
Perfect, works to my expectations
If you’re looking for a castle nut... this is a castle nut. It does what you need a castle nut to do... good quality and no problems.
As always Great product
Great quality product like always from BCM.
I don’t even have an AR but I needed a castle nut for an Ak stock. The quality is second to none but the main reason I went with BCM is because they sponsor the Bongino podcast, which I also recommend