Gas Gun Accessories and kits

Stainless Steel Knocker Lock for Marui SAIGA12K/SBS

A tighter gas seal The Flux Core spring works in both directions, pushing and pulling. Once fitted, it holds the nozzle slightly forward, keeping it pressed against the bucking right up until the shot. That minimises gas leaking past the BB, so more of each shot's gas goes into firing it.

Reliable feeding, stable cycling In the last part of the bolt carrier's forward travel, the spring helps the nozzle push the BB firmly into the chamber, for more reliable feeding and more stable cycling. RHD spent two years field-testing and gathering data on the Flux Core design before release. The Flux Core nozzle is for GBBR owners who want more consistent performance from their rifle, as a drop-in replacement for the stock nozzle. Browse our gas blowback rifle parts and the rest of the RHD range.

Specifications

• Compatibility:
  • VFC LAR (FAL/SA58) GBB series
  • APFG MCX and Spear LT GBB
  • Maruyama ISO556 GBB
• Not compatible with:
  • APFG MPX GBB
  • APFG XM7 GBB
• Spring fixing: Screw (bolt-lock)
• Type: Complete polymer loading nozzle with Flux Core return spring and adjustable flow valve (NPAS)
• Length: Approx. 97mm
• Materials: Polymer, steel and aluminium alloy
• In the box: 1 loading nozzle assembly

A tighter gas seal The Flux Core spring works in both directions, pushing and pulling. Once fitted, it holds the nozzle slightly forward, keeping it pressed against the bucking right up until the shot. That minimises gas leaking past the BB, so more of each shot's gas goes into firing it.

Reliable feeding, stable cycling In the last part of the bolt carrier's forward travel, the spring helps the nozzle push the BB firmly into the chamber, for more reliable feeding and more stable cycling. RHD spent two years field-testing and gathering data on the Flux Core design before release. The Flux Core nozzle is for VFC GBBR owners who want more consistent performance from their rifle, as a drop-in replacement for the stock nozzle. Browse our gas blowback rifle parts, VFC range and the rest of the RHD range.

Specifications

• Compatibility: VFC M4 and HK416 V2/V3 GBB series, including:
  • VFC M4, MK18, URGI, M733, M16, BCM and T91 GBB
  • VFC HK416D, HK416A5 and M27 IAR GBB
• Not compatible with:
  • VFC "EVO" AR GBB system (L403A1/KS-1)
• Spring fixing: C-clip (not included; reuse the one from your rifle)
• Length: Approx. 97mm
• Materials: Polymer, steel and aluminium alloy
• In the box: 1 loading nozzle assembly

• CNC-machined aluminum trigger box shell for outstanding durability and precision.
• All-steel fire control components ensure reliable performance and robust strength.
• Straight 2-stage trigger design offers a smoother, more controlled shooting experience.
• Fully assembled drop-in upgrade for effortless setup.
• Includes Bolt-Nozzle Connect SUB-ASSY to enhance realism by raising the hammer higher and ensuring smoother operation.
• Easy drop-in design with no modifications required.
• For Tokyo Marui M4 MWS Gas Blowback Airsoft Rifle

This Full CNC Steel Lightweight Bolt Carrier (with Aluminum Rear Section)

Its engineered for Tokyo Marui M4 MWS / URG-I GBB rifles. Machined from high-strength steel

with weight-optimised cuts and an aluminium rear balance section, it reduces reciprocating mass

while enhancing cycling speed and recoil response.

Compared to the stock cast-alloy carrier, this upgraded design offers:

• Exceptional impact resistance — no cracking or deformation• More precise weight distribution for smoother and faster cycling

• Aluminum rear section for optimal inertia & sharper recoil impulse

• Wide platform compatibility with TM MWS / URG-I and most aftermarket parts

• Stable under full-auto, high-pressure gas, and cold-weather use

A must-have upgrade for players who demand maximum performance, durability, and a refined

Recoil feel.

Compatibility list (for reference):