ProMag Five Seven 10/30 5.7x28mm Blocked 10rd Mag

CA,CT,MA,MD,NY,NJ,RI,WA,VT Legal Magazine

We modify ProMag FN mags to be permanently blocked to 10 rounds from an original 30 round magazine. Our modification actually makes the magazine easier to open for cleaning than it was originally. We remove the ribs on the body of the magazine that were used to secure the base in place and convert the base to a locking peg system. This allows you to open and clean the magazine without the aid of a c clamp or special tool. In doing this our blocked magazine is considered permanent and does not require to be sealed because of the fact that an original base will no longer stay on without the block inside.

Features and Specifications:

• ProMag magazine 
• Caliber: 5.7x28mm 
• Capacity: 10/30 10 Rounds
• Body Material: Polymer 
• Spring Material: Steel
• Follower Material: Polymer
• Baseplate Material: Polymer
• Finish: Black

For a 15 Round version please add a message with your order and we will be happy to block them to 15 rounds for you.

Mags shipped to NY, CO, CT, MA, RI, WA,VT & DC will have the base sealed shut with epoxy and a rivet to fully comply with the laws there.

For states that do not require the base sealed shut we can still epoxy it shut on request free of charge. Just let us know you would like it done.