After extensive efforts to identify a dependable lock back solution for the double-stack platform, we have successfully achieved our objective. The Atlas Gunworks overpowered spring, when used in conjunction with the Atlas Lockbak follower and a lock back slide stop, provides an optimal solution. These springs are specifically engineered to fit 126mm and 140mm magazines and are designed exclusively for use with Lock back followers.

Magazines with dimensions of 126mm and 140mm are available, designed to accommodate specific requirements and ensure compatibility with designated devices

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Shipping Restrictions

It is the customer’s responsibility for understanding state laws regarding all purchases made. For a comprehensive list of all Shipping Restrictions, please refer to our Shipping Restrictions By State Page found Here.

All NFA Rules Apply

These items are controlled by the U.S. Government and authorized for export only to the country of ultimate destination for use by the ultimate consignee or end-user(s) herein identified. They may not be resold, transferred, or otherwise disposed of, to any other country or to any person other than the authorized ultimate consignee or end-user(s), either in their original form or after being incorporated into other items, without first obtaining approval from the U.S. government or as otherwise authorized by U.S. law and regulations.

It is the customer’s responsibility for understanding state laws regarding magazine capacities. Palmetto State Armory abides by all state regulations regarding the sale of high capacity magazines. We DO NOT ship high-capacity magazines with firearms to certain states. We WILL NOT replace high capacity magazines with state compliant magazines. We DO NOT offer refunds in place of the magazines. Please see our terms and conditions for a list or restricted states.