CMMG Dedicated Upper POI

[rocketsci]

Greetings Calguns!

I just received a new CMMG dedicated .22lr upper, and while shooting it this past weekend, I noticed that the point of impact was about 6" lower than point of aim.

Since I didn't have any tools with me (go figure, I was too eager to go shooting!), I found that I had to aim about 1/2 way down the front post.

Is this normal/typical for this setup? Will there be problems with adjusting the elevation that much?

Windage was fine after a few adjustments to the rear sight.

It is a M4 LE with the F marked triangular frnot sight and a Magpul MBUS (1st gen) for the rear sight.

Thank you!

[rescuerigger]

The problem might be with height of the BUIS.

From CMMG website: "The F marked FSB is the correct height sight for a flat top M4 receiver and the detachable carry handle or folding rear sight."

Call CMMG and ask the Techs. They are very helpful. Contact info is on the website.

http://www.cmmginc.com/pages/contact.html

Please PM me when you get it figured out, I have one on order for my AR too.

Good luck!!

[tonelar]

Im using the same upper with a height adjustable rear sight... Its definitely higher than where a mbus would sit.

[shadow65]

I'm sure you will have to adjust the front sight for elevation. .22 is not going to have the same poi as a 5.56. I've not used the MBUIS with my .22 set up so I can't really comment on that. I use LMT A2 rear sights or optics. My A2 gives me the ability to adjust for elevation for different distances.
I agree, call CMMG and ask for Lucas.
Dave N

[NorCalDustin]

Just adjust the front sight post... Sometimes a good deal of adjustment is needed... No big deal.

[rocketsci]

Thanks everyone! Looks like the front post will adjust enough, but I won't know till I make it to the range. In the meantime, I'll drop a line to tech support and see what they say...

[Gts408]

I have one coming in too. I can't wait to get it. how are the groups on it?

[NorCalDustin]

I have one coming in too. I can't wait to get it. how are the groups on it?

These are the kind of group's I'm getting:
Eley -- sub 1" groups at 50yrds
Federal Bulk -- ~2" groups at 50yrds
CCI Mini Mags -- ~1.5" at 50yrds
Remington GB's -- ~3.5" groups at 50yrds.


All from the bench.

[shadow65]

That is real close to mine.
.807 Eley
1.2 CCI Mini Mags
1.29 Winchester 555
@ 50 yards
4x scope from the bench

[NorCalDustin]

That is real close to mine.
.807 Eley
1.2 CCI Mini Mags
1.29 Winchester 555
@ 50 yards
4x scope from the bench

Yeah... I'm not the greatest bench shooter (I find it uncomfortable to shoot off bags)... I also used my Leatherman to get a rough measurement on the groups.

Like I've always said, a better shooter would probably get better groups... I'm average.

[shadow65]

Not at all. Don't sell yourself short. I consider that great shooting considering the upper has a stock barrel.
Dave N

[510]

Hi, not to get this thread off-topic, but where is everyone buying these uppers, direct from CMMG?

[NorCalDustin]

Hi, not to get this thread off-topic, but where is everyone buying these uppers, direct from CMMG?

I've purchased one direct from CMMG and one from Shadow65 (he has an Ad in the Marketplace).

[shadow65]

Hi, not to get this thread off-topic, but where is everyone buying these uppers, direct from CMMG?

IM sent

[rocketsci]

Still waiting for a response and more time at the range to test the adjustment I made...

As for groups, I was shooting CCI mini-mags from a standing offhand position (no sling) and getting 4" groups at 25 yards. Not great, but almost certainly a reflection on the shooter, and not the equipment!