Complex sentence: The M40A5 has only a few inches of rail space beyond the scope for a night vision optic; extending the rail length would allow more accessories to be attached, enabling snipers to put rounds on target under any conditions.
Split into simpler sentences: The M40A5 has only a few inches of rail space beyond the scope for a night vision optic. Extending the rail length would allow more accessories to be attached, enabling snipers to put rounds on target under any conditions.