Locking shoulder to allow your HKG3 or CETME to use the delay locking system. To use these, swap out your factory delay lock with this and also remove the side lock. All our modified delay locking pieces are marked 45acp on both sides. The HK units are the ones on the left and are usually pretty shiny, the Cetme units and the ones on the right and are usually much darker. Try to only use Cetme locking shoulders in Cetme bolts and HK locking shoulders in HK bolts. They have slightly different dimensions and will cause problems with feeding and ejection if you mix these up.
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