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This was a temporary field fix for the older USGI 30 round aluminum mags with the horrible early type followers. The permanent fix was a new mag that worked. This fix sometimes salvaged a bad mag for short term use.
The problem was bolt over base stoppages caused by the mag follower. The old style follower would tilt down at the rear, letting the bolt ride up and over the next round. Sometimes a double feed would also occur.
FIX: Take down the mag. Lube up the insides. Lube up the follower. Take the spring and gently spread the TOP 5 or 6 REAR coils. Spread the rear TOP coil so that the spring COIL RESTS AGAINST the bottom rear of the follower.
The spring end still goes through the hole on the bottom of the follower. The spring now should assume a distinct banana shape. This increases the spring tension on the rear of the follower, thus stopping bolt over base jams.
A temporary fix. How long temporary still is unknown. Understand that when modifying the springs from their OEM condition, such modifications must be consider expedient and temporary. Hope this helps. Yikes!!
The problem was bolt over base stoppages caused by the mag follower. The old style follower would tilt down at the rear, letting the bolt ride up and over the next round. Sometimes a double feed would also occur.
FIX: Take down the mag. Lube up the insides. Lube up the follower. Take the spring and gently spread the TOP 5 or 6 REAR coils. Spread the rear TOP coil so that the spring COIL RESTS AGAINST the bottom rear of the follower.
The spring end still goes through the hole on the bottom of the follower. The spring now should assume a distinct banana shape. This increases the spring tension on the rear of the follower, thus stopping bolt over base jams.
A temporary fix. How long temporary still is unknown. Understand that when modifying the springs from their OEM condition, such modifications must be consider expedient and temporary. Hope this helps. Yikes!!
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