The differences are as follows:
- The LSS-XL has a thumb shelf built in.
- The LSS-XL has the forend extended by 3"
- The LSS-XL has M-LOK on 5 sides. The LSS on 3 sides
- With the LSS-XL you are able to choose between a carbine or fixed stock version in most cases. With the LSS we only support carbine, although a fixed stock adapter can be added.
- Naturally, the LSS is lighter than the LSS-XL
- The LSS-XL has the capability of adding a Night Vision hood
- The LSS-XL can take a barrel size of 1.35". The LSS up to 1.25"