Prometheus soft hop-up chamber packing

Prometheus hop-up packing hard(red)

Prometheus Hop tensioner(bridge type)

Prometheus straight chamber packing

BullGear PKM hop-up chamber

BullGear M249 hop-up chamber

RetroARMS Hop-Up Chamber for M249

Retro ARMS AK hop-up chamber

Pro-Win камера хоп-ап на АК

PDI W hold chamber packing

МАХХ hop up МE-PRO with LED

RetroARMS AK Cube

R-hop

R-hop+M-nubs

Maple Leaf Super bucking

Maple Leaf Decepticon bucking

Maple Leaf Autobot bucking

Maple Leaf Wonder bucking

Maple Leaf Omega Nub Tensioner

Maple Leaf Super-Macarone Flathop bucking

Maple Leaf Macarone Flathop bucking