Description:
CMMG is the gold standard for conversion bolts. They're by far the most common, have the most support, etc. While there's room for improvement on reliability (see BoreBuddy on the accessories page), they're a great go-to for .22lr conversions.
The Bravo and Echo conversion kits are largely the same. The Echo kit just comes with some additional accessories (anti-jam charging handle and forward assist adapter).
Overall we'd recommend the Bravo kit as the other accessories that come with the Echo kit aren't as necessary. Put that money towards some BoreBuddy accessories instead.
LRBHO functionality:
- Works with both Catch22 and BetterMag
Price/Links:
- https://cmmg.com/556-to-22lr-conversions | $190 for just the conversion