Re: Questions about a 22 conversion kit for AR
Drew,
Some of this has already been stated but bear with me as it helps me put everything else in context.
1. They are an inexpensive way to shoot the same gun you are running for real with the same controls and feel. I run a conversion kit in my 10.5" M4 and also with my 14.5" perimeter upper. I do not lose out on any weight, ergonomics, or change in trigger pull, just absolute accuracy. All this without the cost of setting up a dedicated upper and having to change over my fore ends, light, sighting system, and investing in an additional flash hider for my can.
2. As has already been stated the CMMG or Ceiner are basically the same animal. I got my CMMG through Brownells and it comes with the preferred Mad Dog magazine. (the quality of construction of the CMMG was in question when I first got it as the welds on it have a surface crack and bug holes, but it has yet to fail with well over 3000 rounds through it) The Mad Dog magazine is key, to reliable operation and consistency in feel. The Mad Dog has the same profile as a standard 30 round AR mag. I did add a piece of high density foam to the bottom of the mag to help protect it when I let it drop free. Buy extra mags they are relatively cheap in the grand scheme of things and should be considered the cost of doing business, like buying ammo.
3. Ammo? As has already been stated the accuracy with a 1/7 or 1/9 twist 5.56 barrel is not going to yield pin point accuracy. So with that being said I would run the copper plated stuff 40 grain or higher. I stay away from the lead bullets as they get a little shaved in the chamber and running down the pipe. Accuracy should be judged in this case by whether you are still able to accomplish effective training or not. Will you still be able to run gun drills out to 50 yards and even 100 yards...yes. Within 25 yards it should be no problem to keep your rounds within the "A" zone.
The dedicated upper is an excellent option but one that I am not wanting to invest in right now. A dedicated upper like what Spikes offers is certainly the cats meow and you will not be disappointed in its performance. Decide on what works for you, function of training or pin point accuracy?
What sucks is the availability of .22 ammo right now. Good luck hope this helps and let us know what you end up with and how it works out.
Take care,
Danel