Fitment: 170mm tubes | Lockback follower + 13-coil spring | 18% overpowered
Features
Includes 1 Atlas Gunworks lockback follower and a 13 coil 18% overpowered magazine spring.
Designed to used in 170mm magazine tubes.
Premium follower and spring kit.
Direct drop-in.
Improves feeding, bullet stack, and lockback
***Longer springs under intense pressure do lose tension faster than shorter springs. Frequent magazine spring replacement might be needed for reliable lockback.***
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