Buyers of rifle suppressors often choose a single .30-caliber model for both 5.56 AR-15s and larger cartridges such as .308 and 6.5 Creedmoor. A .30-caliber suppressor handles 5.56 safely because it is built for bigger projectiles, and the SilencerCo Omega 300 is one example that also works on 5.56 rifles. Dedicated 5.56 suppressors typically cut sound and flash more because their bore matches the bullet, while multi-caliber units add extra weight and length at the muzzle that can unbalance a carbine and shift point of impact. One .30-caliber can covers several rifles at lower total cost, whereas a dedicated can stays lighter and shorter for an AR-15 used most often. Many owners begin with a multi-caliber suppressor and later add a dedicated one.