What are the options for rail mounted sights that are lower than standard

[ramairthree]

AR height.

For example,
you wanted a lower 1/3 co-witness without a riser on your RDS,
or to have BUIS under a scope but not offset?

Thank you for any info.

[markm]

None that I know of. With the straight line buttstock and recoil system, you can't go much lower than standard height.

[El Cid]

Troy has micro BUIS that were designed for the piston rifles (Sig 556, HK416). Not sure if they will do what you need.

https://troyind.com/backup-iron-sights/folding/micro-sets

[ramairthree]

thank you.