Latest PDI Japan product now at Spring Lock... "Dear Sir, today we want to inform you of the PDI new product: The W Hold Chamber Packing. This is for TM VSR-10 original chamber(called G chamber), it is also available to TM GBB pistols as HI-CAPA(5.1,4.3& EXTREME) ,  Glock (26,17,18C), PX4, DETONICS, 1911, MEU ,& SOCOM.

It has two ring ribs on the outer surface to improve airtight and has 'W hold ribs' inside. Two ribs in the packing are steady of the BB's trajectory.

This holds the BB at the best position, so this packing will bring better accuracy.

In this new one, set the special rib inside to keep airtight.

It is made of nitrile rubber (Hs50), and has high oil resistant and abrasion resistance. You can use it all season!

Best regards,

SPRING LOCK"