The SIG Sauer 551 Magazine is a standard factory replacement magazine. This magazine is designed for .223 Remington/5.56 NATO, and holds 20 rounds. This magazine comes in a clear smoke finish.

Specifications and Features:
SIG Sauer
551 Magazine
.223 Remington/5.56 NATO
20 Rounds
Clear Smoke
This magazine will NOT fit 556, 516, M400 or any AR-15 type rifles