.22LR AR-15 Conversion Question

[hitecredneck54]

I have a Rock River LAR-15 carbine in 5.56 that I have purchased a CMMG .22 upper for. Is there anything I need to do to the lower to prep it for the new upper?

 

[tyeo098]

Make sure your hammer isnt notched. Some uppers have issues with that.

Thats about it.

 

[hitecredneck54]

.22LR AR-15 Conversion

Thanks for the heads up, the rifle fires great, except for being finicky on the ammo it likes. A lot of that is because it's new and has less than 500 rounds through it. My only problem is I need to get a forward assist put on it, but can't find one.