The BT37 Atlas Spike Feet are easily installed with the press of a stainless steel plunger to any V8, PSR or CAL model Atlas Bipod. They deliver a singularly aggressive foot to support the bipod. The Spike portion is approximately 1.125” long with the largest OD of approximately 0.812”. Sold as a pair. Available in raw stainless with black insert only. NSN 1005-01-675-3612