The rifle is a preban DPMS. I just put a new DPMS lower parts kit in it about a year ago. The barrel is a DPMS chrome lined 1/7 twist M4 from CMMG. The bolt and carrier are Bushmaster. The upper is a RRA from Legal transfers. The buffer is a standard carbine buffer that I pulled apart and replaced the standard weights with 50 cal lead balls that I pressed into cylinders. The buffer brings the total mass of the carrier/bolt/buffer to right around what a full-auto M4 with an H-Buffer would be.
The ammo is PMP 55 grn lot #027.
I shot the group because my brother in-law was wondering how I could do at that range with my Aimpoint. He had been shooting his rifle and was doing all right, but not great. I put a new target paster on my target, settled down and started shooting. I didn't shoot super slow, but not fast. I gave the rifle time to settle back down and reacquire the sight picture. I went through the whole mag like that. Just shoot, let the rifle settle, put it back on target, and squeeze. I spend much more time when shooting groups through my rifles with optics.
Here is a pic of my new 18" medium rifles group at 100 yards. 5 shots with Federal match 69 grn. It has a Harris 1/9 twist had lapped barrel from Georgia Precision, RRA NM trigger, a chromed Bushmaster bolt/carrier, and a Tasco SS 10x mil dot on it. I was shooting clay pigeons at 350 yards 2 weekends ago with it.
[img]http://www.gunsnet.net/album/data/3042/2694argroup2.jpg[/img]
Shooting just takes practice and the willingness to put in the time. I have been doing it for over 21 years now.
IDHunt