As many of you know Geissele won a SOCOM contract and has been making deliveries of a small framed AR chambered in 6mm ARC. These comments are from my son who works with Naval Land Warfare.
The teams really like the rifle. Geissele won a pretty grueling competition and apparently they were very innovative. Some of the specific things that Geissele did include, a redesigned feed ramp for increased reliability with the 6mm. Steel inserts in the upper receiver to again help with reliability and durability with the higher pressure. A completely redesigned BCG made with a new steel that increased service life by 300%. A CHF chrome lined barrel that is getting close to the same accuracy as a stainless barrel with almost 200% more life between replacements. A ground up redesign of the magazines which apparently is a big deal. They are straight mags, not like 6.5 mags with the curve. It allows the use of current plate carriers without having to reconfigure them. The DMR guys like that they 6 ARC effectively has the same range as the .308 and similar wind fighting capability but they are able to carry 40% more ammo then a .308 loadout and still are lugging around less weight. For those of you that care, they are pairing them with some kind of 3x20 Schmidt and Bender short scope. The current accepted loadouts include a 14.5" variant and an 18" variant. They are currently evaluating a 12.5" variant and I think he said a 20".
The teams really like the rifle. Geissele won a pretty grueling competition and apparently they were very innovative. Some of the specific things that Geissele did include, a redesigned feed ramp for increased reliability with the 6mm. Steel inserts in the upper receiver to again help with reliability and durability with the higher pressure. A completely redesigned BCG made with a new steel that increased service life by 300%. A CHF chrome lined barrel that is getting close to the same accuracy as a stainless barrel with almost 200% more life between replacements. A ground up redesign of the magazines which apparently is a big deal. They are straight mags, not like 6.5 mags with the curve. It allows the use of current plate carriers without having to reconfigure them. The DMR guys like that they 6 ARC effectively has the same range as the .308 and similar wind fighting capability but they are able to carry 40% more ammo then a .308 loadout and still are lugging around less weight. For those of you that care, they are pairing them with some kind of 3x20 Schmidt and Bender short scope. The current accepted loadouts include a 14.5" variant and an 18" variant. They are currently evaluating a 12.5" variant and I think he said a 20".