Midwest Industries' SIG 556 folding front sight mounts to SIG factory gas blocks and is also compatible with SIG 552 rifles equipped with AR15 height rear sights. It utilizes a standard A2 front sight post and the lock detent deploys in an upright position.
Features :
Features :
- Mounts to SIG factory gas block
- "Height compatible with AR-15 rear sight" also compatible with SIG 552 rifles equipped with AR15 height rear sights"
- Uses standard A2 front sight post
- Super smooth ball bearing pivot design