I've shot pretty reasonable groups out of my x39 with a scope on it. About a 3MOA rifle with Barnaul. Heaps accurate for shooting animals. Great goat gun.
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Our HK417's in 16" and 20" have been solid MOA and under rifles if the shooter does his job.
Also the LMT LM8 MWS is a pretty solid MOA shooter and with the 20" barrel one of the best single 5 shot groups I have shot with a semi:
Suppressed at 100 meters, Lapua 167gr factory Scenar ammo:
http://www.aseutra.fi/assets/images/...LM8-20inch.jpg
Another suppressed group at 100 meters, same Lapua ammo, suppressor removed between every shot:
http://www.aseutra.fi/assets/images/...suppressor.jpg
Best Regards!
Tuukka Jokinen
Ase Utra sound suppressors
My 11.5" AR build in 5.56 could shoot before I swapped the barrel out for 6.5 Grendel.
Could do better if I had more than a 2-7 Vortex scope on it.
0.62" with Gamekings and 0.65" with Tipped Matchkings at 100m
Attachment 78461
0.60" with Tipped Matchkings at 100m
Attachment 78462
First hand: a mate printing a roughly 2" three shot group at 600 yards (about 550m) with an AR in .223
ASI AR15, shot 0.25" groups at 100m. It was far to heavy to shoot with (goat control out of the heli) so I turned the barrel down and shortened it from 24" to 16". Still shot very well...but not as well as it once did.
Not even sure if ASI are still making guns, but they used to get forged components and machine/hand finish them for precision fit. I've had a few AR's and that was by far the best one I owned.
My First AR an NEA 18" DMR would shoot 15mm groups with 77grain SMK's but not so nice with light projectiles.