The Graco Models Mark II Picatinny Mount Case Catcher mounts to a picatinny rail to position the bag to match the ejection port. These can be indentified by only one cross groove. The standard rail will have multiple crosscuts.
Brass Catcher w/Picatinny
Graco Models
Case Club 2 Pistol & Accessory Hard-Sided Padlockable Carrying Case
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