First range report on the DPMS .22 upper:
Well, I took it out a few times this weekend. First time was just a function check and put a hundred or so rounds through it for fun with my son, and it worked fine - no problems. It was set up just as in the picture in the post above.
Next time was to check accuracy with different ammo. I wanted to try it in 3 different setups:
- Iron sights - A2 style rear with the large and small apertures. I only used the small one.
- Aimpoint RDS 1x30 clone on a cantilever mount attached to the M44L handguard rails.
- Leupold VX1 4-12x40 in Leupold QRW low rings, mounted on an ARMS #02 carry handle mount. The scope was left on 12x.
Most of the shooting was 25 yards - the longest distance at the indoor range. First, I sighted in the iron sights, then the RDS clone, and the Leupold. I'm not the best rifle shooter around, and I need a good magnified scope to get decent groups, so that's the Leupold's job.
Once the clone was sighted in, the dot was right on top of the iron sight post, as it should be for an absolute co-witness. It did make the field of view cluttered, but that would have been better with the big aperture. I could also sight in above the rear site just fine, which helped a lot.
The highest brightness setting on the clone is incredibly bright indoors - even glaring - so I used the lowest one, which was still pretty bright. It's not the roundest dot I've seen, either, and the dot obscures the red and black center of the targets below at 25 yards, but it was quick and easy to use.
Now, the trigger on this lower sucks. It's stiff and uneven, and I need to fix it. I had to concentrate to keep the groups small, or I got a lot of side-to-side play in the groups from the trigger pull.
All groups are 10 rounds, shot from a rest on my range bag. For plinking, I used CCI Stingers, Federal Champions, and Zappers. For the accuracy tests, I used my favorite - SK Plus target ammo from outdoormarksman -
www.outdoormarksman.com/product_info.php?cPath=65_2_54&products_id=1313. It's great stuff, and shoots as well as ammo costing a lot more. I figure I shot around 250 rounds total.
I had a few problems, but nothing major. The biggest one was that the hammer would sometimes follow the bolt, putting a little mark on the primer but not firing. It may have something to do with the crappy trigger, but I need to dig in a bit. I also had one failure to extract, which I pulled out with my fingernail. Normally, the primer hit is extremely solid - a big, round dent.
The mags are pretty tight, and the metal inserts appear to be parkerized. They're a bit rough on the inside, and sometimes rounds would stick going down in the mag, preventing me from loading more. Pushing the top round up and down a few times would usually loosen it up. On these mags, the ejector's part of the mag, and I was worried about a bit of looseness in the lower, but they worked fine.
Overall, it's been very good. If I bought a new one, I'd get the M4 style, with a flattop and a lighter barrel. The M44L handguards are very comfortable, if fat, with the rubber covers on the rails, and the collapsible stock with the cheekrest on it works great for this kind of shooting.
Here's a pic with the Leupold mounted.
Here are some groups:
My first accuracy group - this was when I noticed how much the trigger was messing with me. 25 yards, SK Plus, Leupold scope:
I shot the same group again with a bit more care and got this (damn that flyer!):
Same group with Stingers:
And with Zappers:
I pulled the target in to 10 yards - the group dropped about 2.25":
I took off the Leupold and mounted up the Aimpoint clone:
And took off the clone and used the iron sights:
After this, I remounted both the clone and the Leupold a couple of times and reshot the groups. There was very little zero shift from this, but that's harder to check well at 25 yards.
I'm pretty pleased, overall. I'll need to take it out to 50 yards at the outdoor range and see how it does, but so far, I'm pretty happy.
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