This guide details the installation and operation of the X-PRT90 progressive trigger system for the FN PS90 SBR. The X-PRT90 offers a unique third position that allows for a faster rate of fire by pushing through the trigger pull, effectively creating a legal 'forced reset' malfunction. The video also touches on CMMG barrel modifications and the PS90's unique bottom ejection.
This CMMG .22LR SBR build features a dedicated 4.5-inch barrel and bolt for improved accuracy over conversion kits. The 1:16 twist rate is optimal for .22LR, unlike standard AR-15 rates. It's presented as an excellent, cost-effective trainer for AR-15 manual of arms and for new shooters.
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