The E-23 rubber o-ring acts as an inner barrel stabilizer on all LM4 PTR GBB rifles, as well as the entire AKG Series. It appears on respective diagrams as LM4 PTR part 44-0, and AKG part 63-0.
E-23 Inner Barrel Stabilizer O-Ring (Part 44,63)
$2.10
The E-23 rubber o-ring acts as an inner barrel stabilizer on all LM4 PTR GBB rifles, as well as the entire AKG Series. It appears on respective diagrams as LM4 PTR part 44-0, and AKG part 63.
