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This 11coil mag spring is for use in standard capacity 17/22 models and will work with most plus 1 and 2 extensions
External Forend Weights by ISMI Spring Sales are designed for M-Lok chassis and forends
Part#: GL2
Designed for use with MagPul and most mil-spec followers
This 10coil mag spring is for use in standard capacity 19/23 models and will work with most plus 1 and 2 extensions
G43/48 Single Spring Guide Rod AR-15 This 11coil mag spring isISMI rods are machined from stainless steel and utilize a button head screw to retain the spring when the assembly is out of the pistol. This allows the shooter to dis assemble the guide rod for spring replacement or maintenance. Designed for use with ISMIs single flatwire spring replacement. Part#: GLGR 43 ****Springs available in 15 and 17lb variants.
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