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 (with a small shim to fit AR15 magwells)
- Black Dog Machine 32 round Gen III magazines
Also compatible with the Magpul BAD Lever
Compatible with all CMMG and Ciener format conversions including:
- Spikes Tactical
- Tactical solutions
Not suitable for the Kriss Defiance, SGC V22 or Sig Sauer 522.
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.