Atlas - Area 419 Arcalock Spigot Extension Tray This can be measured by

This can be measured by using the Case Gage Depth Micrometer

The stock is recessed on both sides to accommodate left and right bolts

1) You want your reloaded rounds to chamber in a variety of guns

22mm and 30mm available Foresight Ring inserts designed to fit into Berger 100 pack projectile boxes

Atlas - Area 419 Arcalock Spigot Extension Tray This can be measured byThe ARCALOCK Spigot Extension was designed for Area 419s ARCALOCK clamp and any ARMS17 S accessory with matching hole pattern of 1. 100. It is ideal to adapt the BT35 NC 5 H Atlas Bipod to an ARCA clamp for clearance of the cradle and operation of the clamps knob. It will also extend all NC or No Clamp models (BT10 NC, BT46 NC, BT47 NC, BT35 NC, BT65 NC, BT69 NC, BT72 NC) of Atlas Bipods out extra 1. 25 for increased stability. To use with your Bipod