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Shield Arms +5 mag extension for the S15 magazine. 12 coil plus power spring included.
S15 +0 aluminum base plate for the S15 magazine - details below.
Replacement spring for the Shield Arms S15 +5 Mag Extension only.
S15 +0 plastic base plate for the S15 magazine - details below.
Shield Arms +2 mag extension for the gen 2 and gen 3 S15 magazine.
Shield Arms S15 magazine with an installed Shield Arms +2 magazine extension, for a total of 17 rounds.