Buy a .22 LR AR-15 conversion kit online at Brownells.com or Botach.com, as of 2015. Prices on these conversion kits range in price from about $170 to $230, and ratings on both sites are 5 stars out of 5 stars.
There are two .22 LR AR-15 conversion kits available from Brownells.com. These kits come ready to install into any AR15 semi-automatic, and the kits help to make shooting more affordable. To install these kits, replace the carrier and bolt with the conversion kit, and then load up the magazine with round-nose, high-velocity .22 LR ammunition. Made of carbon or stainless steel, these kits come with a brass extension bushing, 25-round magazine and a stainless steel bolt group.
The .22 LR AR-15 conversion kits from Botach.com come in three different kit options. The Alpha kit is the basic kit and costs about $170. It includes a bolt group made of phosphated carbon steel, and it is available with or without a magazine. The Bravo kit, also about $170, comes with a bolt group made of stainless steel and is available with or without a magazine. There is also an Echo Forward Assist kit that comes with a bolt group made of stainless steel, an adapter for forward assistance, cleaning jag and an anti-jam charging handle.