The round "flat spring" that moves the lever to the locking position is broken. The lever can be manually moved but can unlock during firing, collapsing the stock.
91A2/93A2 & Gemtech Predator/94A3 (RDTS MP5SD)/94A3 (IGF MP5) & Gemtech Raptor/SP89/SP89 (IGF MP5K-N) & Gemtech MK-9K
270/300/770/USC (Grey) & AAC Ti-Rant (Pending)/SL8-1 (Grey)
Coharie CA89K .40 S&W/Vector V53/Vector V89 .40 S&W & Gemtech Raptor-40
HK93 .22 Conversion Kit
Fleming Sear in 4 pos 3 rd burst pack