series is the most comprehensively engineered scope mounting solution on the market and offers the following unprecedented list of features:

| M10 Ring Sizing Chart |
X-low 20mm (.79") |
Low 24mm (.94") |
Medium 28mm (1.10") |
High 32mm (1.26") |
X-high 36mm (1.42") |
| 1 in | Yes | Yes | Yes | Yes | Yes |
| 30mm | Yes | Yes | Yes | Yes | Yes |
| 34mm | No | Yes | Yes | Yes | Yes |
| 35mm | No | Yes | Yes | Yes | Yes |
| 40mm | No | No | Yes | Yes | Yes |
QD-S and
QD-L
QD-S
is designed for use on 5.56 AR platforms with short rails and allows forward placement of scope for access to the charging handle.
QD-L
is designed for use on rifles with full length rails such as the FN SCAR and ARs with one-piece upper receivers.
QD-S and
QD-L
place optical center 1.5 inches above the rail to accommodate most folding sights.
