Complex sentence: The M829 has a ballistic cap and five tail fins made of aluminum; it also has a four-piece aluminium sabot, which holds the sub-caliber round in place in the barrel and breaks off into four "petals" as the round leaves the gun tube.
Split into simpler sentences: The M829 has a ballistic cap and five tail fins made of aluminum. It also has a four-piece aluminum sabot, which holds the sub-caliber round in place in the barrel and breaks off into four "petals" as the round leaves the gun tube.