Happy CMMG upper owner here. I picked mine up from these guys http://aeonarms.com/catalog/product_info.php?manufacturers_id=57&products_id=2361 I saved ~$40 since the upper, mags and shipping were all cheaper than buying direct from CMMG.
January 12, 2011, 08:01 AM
I have had Velocity's AR22-100 for about a year and a half now and have put over 4 bricks of 22's through it without any problems whatsoever. I highly recommend their product.
Here it is on my RRA Lower.
January 12, 2011, 09:51 AM
I've got a Spike's, and while it's still going through it's paces, I've had no issues.
January 12, 2011, 04:32 PM
I am very happy with mine from Tactical Solutions (http://www.tacticalsol.com/products/22-lr-conversions?page=shop.product_details&flypage=flypage.tpl&product_id=28&category_id=12). I picked it up used at a fair price.