The Area 419 ARCALOCK 14.25" Universal Weight-Tunable Arca Rail is as universal as possible, while still retaining weight tuning capability. These kits will come with t-nut hardware to add attachment points if your factory-installed attachment points do not line up with the mounting slots. This rail should fit about 98% of Manners PRS1, PRS1, T2A, T2A GAP, T4A, T4A TEAM and T5A stocks. These rails are .400a ^2 thick. The bare rail weighs just over 6oz. With all 5 included weights in the rail, the weight ends up at about 23.6oz. Each weight weighs 3.5oz. Rails will be black hardcoat anodized, and the weights will remain raw brass.