Civilian Marksmanship Program
Sturm, Ruger ® & Company
The Shootist
Fulton Armory
Wrenco Arms
Lee's Gun Parts
American Handgunner Magazine
On Target Magazine
Guns Magazine

The Country Shed
The Garand Collectors Association
Vang Comp Systems
The Vang Comp System (VCS), designed by gunsmith Hans J. Vang, is a set of modifications to shotgun barrels. The alterations to the barrel consist of lengthening the forcing cone, back-boring the barrel, and adding compensating ports. With the VCS, accuracy significantly improves, felt recoil is dramatically reduced, and muzzle rise diminishes.