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.
Semper Fi!
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)
USP40/P7M8/P7M13/HK4(H&R Comm)
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