Overview Reviews Product Description Rail section is made of Hard Anodized Aircraft Aluminum Alloy. Made to the Mil-Standard 1913 Picatinny Arsenal Specifications. Features a Snag resistant design, while retaining Mil-Standards. M-LOK Compatible. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × BCM BCM 3-inch Picatinny Rail Section, Aluminum (M-LOK Compatible) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments