The Catch22 bolt release 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
- 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
How it works: the lever extends the bolt hold open latch and magazine contact points forward from the standard .223 point at the rear of the magazine. By extending the latch to the .22 feed point and bolt face it allows normal bolt hold open operation.
Fitting is a quick 5 minute parts swap, use a punch pin to partially remove the pin holding the bolt hold open catch so you can swap them over (if your AR has a roll pin fitting) minding the small spring underneath, if you have a threaded pin then it's a quick allen key job.
See our related accessories:
M&P 15-22 magazine adapter (clip on)
