Big Dragon Folding Railed Front Sight / Gas Block MOD.A

Big Dragon
Code: BD3832
  • VLTR style folding front sight for M4/AR15
  • Integral 20mm Picatinny rail
  • Replaces the triangular front sight post/gas block

For those who feel like if they replace their M4/AR15 front sight post they will miss it when it's gone, now you can have your cake and eat it too! The Folding Railed Front Sight / Gas Block from Big Dragon is designed to replace the original M4/AR15 triangular sight and provides a flip-up front sight with an adjustable sight blade which doubles as a 20mm Picatinny rail when flipped down. As a bonus, this front sight also includes a QD sling socket on either side which can be used with a rear sling point to attach a two-point rifle sling. 

Full description


The Folding Railed Front Sight / Gas Block from Big Dragon is constructed from aluminium with steel locking screws and is designed to replace the standard M4/AR15 front iron sight. This sight can be used either raised as a primary sighting system, similarly to the standard tri-sight, or folded to provide a short Picatinny rail section at the front of the rifle, perfectly positioned for a PEQ box or tactical flashlight. This sight is a standard height for M4/AR15 rifles and will align perfectly with the vast majority of aftermarket rear sights, including those of the M4/AR15 carry handle. 

The front sight blade can be adjusted for elevation using an M4/AR15 front sight adjustment tool, allowing it to be set for specific ranges for target shooting. On either side of the front sight/gas block, we can note the presence of QD sling sockets, one on either side. This can assist with rifle setups with only a single sling point at the rear, and allow a two-point rifle sling to be used. 

This front sight mounts to your barrel via two steel Allen bolts, saving you the hassle and risk of hammering pins through as with the original front sight. If you are 50/50 about replacing your front sight with a low profile gas block, why not try this and have the best of both worlds?


  • Aluminium construction
  • Flip-up front sight/gas block
  • QD sling sockets on either side
  • 20mm Rail available when the sight is flipped down
  • For M4/AR15 AEG or GBBR

Package Includes

  • Big Dragon Folding Railed Front Sight / Gas Block MOD.A



External Part Type
Sight Post / Gas Block
Package Includes
Gas Block


Colour Wheel Greyscale
Item Colour
Construction Icon
Aluminium with steel screws

Weight and Dimension

Product Height
Approx. 5cm
Product Length
Approx. 5cm
Product Width
Approx. 2.7cm
Weight KG Icon
Weight (KG)
Approx. 0.069kg

Part Specific

Rail System Icon
Rail System
20mm RIS / RAS
Weapon Platform
AR Platform, M4 / AR15 / M16, Long Gun, Assault Rifle,