SHS

SHS Metal M4 Airsoft One Piece Hop Up Chamber Kit

Raptors Airsoft

Raptors Airsoft RTX Hop Up Bucking & Nub Maple Leaf 75 Hard Rubber

Raptors Airsoft

Raptors Airsoft RTV AEG M4/M16 Metal Hop Up Chamber

JG

JG/Golden Eagle Hop-Up Unit with Bucking for M4

SHS

SHS Airsoft M4 Hop Up Chamber CNC 7075 Aluminum W/ Bucking & Nub AEG Gun Set

Lonex 70 Hard Airsoft Hop Up Bucking With Nub

CNC Hop Up Unit for AK Variants

Lonex

Lonex Airsoft Metal Enhanced One-Piece Hop-Up for M4/M16

Prometheus

LayLax Prometheus Wide Use Rotary Style Hop-up Chamber (G&G Armament & KRYTAC M4 Series AEG)

CNC Hop Up Unit for M4/M16 Variants

Elite Force

Elite Force M4/M16 First Aid Tool Kit

ASG

ULTIMATE Upgrades AK Series Hop-Up Chamber, Metal

JG

JG Metal Hop-Up Unit for M4 AEGs

Raptors Airsoft

Raptors Airsoft RTX Hop Up Bucking Gas Maple Leaf 50 Hard Rubber

SHS

SHS Airsoft AK Hop Up Chamber CNC 7075 Aluminum W/ Bucking & Nub AEG Gun Set

SHS

SHS Airsoft M4 AEG Hop Up Chamber Parts Bucking & Nub Included

SHS

SHS Airsoft MK36 Hop Up Chamber CNC 7075 Aluminum W/ Bucking & Nub AEG Gun Set

Element

Element Silicon Airsoft Hop Up Bucking 55 Hard