Specna Arms HOP-Up Chamber Block for AK / SA-J Series AEGs

If you're fixing up your Specna Arms AK, this may be useful! The Specna Arms HOP-Up Chamber Block for AK / SA-J Series AEGs is an original replacement part for the SA-J AK AEG series. The HOP-up chamber block helps support the HOP-up unit to prevent wobble, and also prevents over-insertion of the magazine.