5 SCAR-Hs. From top: 1. 20" barrel. Name "Sniper" was changed to "LB" for Long barrel. 2. 20" heavy barrel, better trigger, bipod, etc for greater accuracy for use as DMR = Designated Marksman Rifle. The Designated Marksman is part of squad and one level down from a sniper. 3. and 4. Both the SSR = Sniper Support Rifle = semi-auto rifle used by the Spotter in 2 man sniper team while the Sniper uses bolt action true sniper rifle. 5. Same as 2 but has a non-folding stock for greater rigidity.