My friend got quickly frustrated so I decided to do some research the result of which you are reading here.
Eager to get a conversion kit he quickly hit the web with google and met a brick wall in a lack of availability. I explained to him the virtues of cheap practice ammo, getting to know the rifle and the ability to shoot at any indoor range. Recently a good friend purchased his first rifle, a Bushmaster Modular Carbine. The Colt and the Jonathan Arthur Ciener kits seemed to be the only ones around at the time, at least that was my findings in the Shotgun News and prior to the internet. I purchased my Colt brand conversion kit part# R6222 back in the early 90’s without much fanfare. The cost starts at about double of the drop-in conversion and can go upwards well over $1000. If that accuracy is not suitable you can purchase a complete. Those differences can lead to less then match grade accuracy in an AR15 but the accuracy is perfectly suited for plinking. There is also a few thousandths of an inch difference in the bullets diameter of. The barrels on most AR type rifles will typically have a twist rate that is optimized for the 5.56 Nato (.223) with a 1:7″- 1:9″ barrel twist rate and not the 1:16″ that works well with. The bullet must travel a few inches in an unrifled tube before it reaches the barrel. There is a few down sides to using the drop in kits. The kits will range in price from about $160-$250 and take about 30 seconds to install. Read the history of the AR15 22lr conversions here The Drop-in AR15 22 Conversion Kits are the easiest and least expensive method of converting your AR15 to a. 22 Long Rifle Conversion Kits for Colt AR 15 Rifles and Clones Drop-in AR 15 22 Conversion Kit:
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