Catch 22 V1 Bolt Catch

The Catch22 V1 bolt catch is an upgrade for the standard AR15 catch to enable manual bolt hold open and automatic bolt hold open on .22LR conversions.
It allows manual bolt hold open on all rifles and enables automatic last round bolt hold open function with:
Smith & Wesson M&P 15-22 magazines (using an adapter for AR15 lower magwells - see below)
Also compatible with the Magpul BAD Lever
Compatible with all CMMG and Ciener format conversions including:
CMMG
Lantac
Ciener
Spikes Tactical
Tactical solutions
Chiappa / ATI dedicated uppers
Bushmaster C22
Nordic V3 uppers
Does not work with:
CZ V22 uppers
Southern Gun uppers
Nordic V1 uppers
JP enterprise uppers or kits
Lock back works with the following magazines:
S&W M&P 15-22 (recommended - lock back fully functional)
Kriss Defiance magazines (works - however the Kriss has weak springs so you will need a lightened pocket spring for reliable lock back)
Works but with manual lock back only:
Black Dog Sonic X magazines
Black Dog Gen 1 & Sig 522 magazines
CMMG magazines
Versacarry 28 round magazines
Lantac & IMI magazines
Made in the USA.