Sprinco 30 Round AR-15 Magazine 17-7 SST Flat Wire Spring

Sprinco 30 Round AR-15 Magazine 17-7 SST Flat Wire SpringSprinco AR-15 magazine springs are made from high-quality 17-7 stainless steel flat-wire stock and are a drop-in replacement for your old 30-round mags. Compatible with all 30-round magazine brands and followers, this flat wire magazine spring will function reliably for many years to come. Make your mags run like new with the Sprinco USA AR-15 30-round magazine spring.Features Compatible with all 30-round AR-15 magazine bodies Constructed from 17-7 stainless steel flat wire stock Heat-treated for long-term reliability and strength Keep mags fully loaded for long periods of time without loss of performance