Bolt B4 PDW BRSS Heavy Recoil Black Airsoft Rifle


Bolt B4 PDW BRSS Heavy Recoil Black Airsoft Rifle





The Bolt B4 PDW Airsoft Gun is constructed using high-quality materials, offering a very strong and durable design.

This Bolt model features an Alloy Receiver, Buffer Tube, Ironsights, Outer Barrel Assembly and Mock Suppressor, with a Polymer Stock Pad, Pistol Grip and Magazine.

The Bolt B4 AEG is powered by electric, which powers not only the firing of the BB, but also the recoil of the system, with the battery being stored in the hand guard and connected by a Mini-Tamiya Connector. This allows the replica to fire in semi and fully automatic with a strong and satisfying recoil no matter the weather, this replica is going to perform and have a satisfying kick.

The Bolt Recoil Shock System (or BRSS) is the most significant feature of what makes these replicas awesome, and provides a heavy, weighted recoil when you pull the trigger. This gives the user a strong recoil effect without having to mess around with gas systems which can be unreliable and inconvenient. Unlike traditional AEG 'recoil systems' which simply move the dust cover backwards and forwards, this style of recoil involves a weighted piston moving around at the rear, which brings a whole new level of realism, and feels incredibly satisfying.

The stock of the Bolt M4 replica is a PDW style stock, designed for CQB allowing for easier movement in areas with little space, whether you're disembarking from a vehicle at a mil-sim, or cleaning out a kill house in CQB, the stock is designed for tight cornering right when it matters most. The stock can be adjusted to two positions, open and closed, and is released using an ambidextrous release button.

This airsoft replica features an adjustable Airsoft Hop Unit for range and accuracy, and is adjustable via a Rotary Wheel behind the mock bolt plate, when the mock charging handle is pulled back. The Hop Unit is designed to add spin to the BB before it travels down the barrel making it displace air to add stability to each shot for better accuracy.

The Bolt B4 PDW features multiple railing systems for allowing the attachment of aftermarket parts and accessories, with a top 20mm RIS / RAS rail for attaching sights and scopes, as well as a front 20mm rail on the hand guard for attaching torches and PEQ boxes. This is perfect for convenience as the 20mm attachment is the most common on the Airsoft market,m giving plenty of options for accessories. The hand guard also features M-LOK slots on the sides and bottom to allow more modern M-LOK accessories to be attached, however, if you want more 20mm Rails on the sides or bottom, for existing attachments, you can also purchase aftermarket M-LOK to 20mm Rail converters for ease of use.

The B4 PDW is well worth it's money and gives everything you need to provide you with the most reliable and realistic shooting experience.


  • Bolt Recoil Shock System (BRSS) blowback system
  • Two Position adjustable PDW style sliding stock system
  • Firing Modes - Safe / Semi / Fully Automatic 
  • Wobble free high-quality build
  • 140rnd Medium Capacity Spring Loaded magazine
  • Ambidextrous magazine release
  • Curved trigger guard
  • Battery stored in the hand guard
  • Battery compartment accessed by pulling back the Delta Ring and removing the bottom of the hand guard
  • Mock charging handle releases the dust cover for hop unit access
  • Adjustable hop-up unit for range and accuracy
  • Top 20mm RIS railed receiver for sights and scopes
  • Top 20mm RIS railed hand guard for torches, lasers and PEQ boxes
  • Removable top 20mm RIS / RAS tool-less ironsights
  • Integrated Hand stop built onto the hand guards removable section
  • Mock Suppressor
  • QD Sling Loop Mount Points
  • Compatible with V2 parts
  • Reinforced gearbox
  • Markings: 'BOLTAIRSOFT', 'MADE IN TAIWAN', 'B4A1 CARBINE 5.56MM', 'EU01240', 'BOLT 5.56', 'BOLT AIRSOFT' and 'PART # B4A1'


  • Length: 520mm to 605mm
  • Weight: 2.6kg
  • FPS: 326 (approx using high quality 0.20g BBs)
  • Hop-Up: Adjustable
  • Blowback: Yes

Package Includes:

  • Bolt B4 PDW BRSS Heavy Recoil Rifle
  • 140rnd Mid Cap Mag
  • Stock Removal Lever
  • Instruction Manual
  • Bolt Patch
  • Bolt Sticker

    To buy an airsoft weapon in the UK you must have a valid airsoft defence.

    This is not a licence, it is basically just proof that you intend to buy an airsoft weapon for use in airsoft.

    An airsoft defence could be a UKARA or membership with the British Airsoft Club, and various other forms of defence.

    You can only obtain an airsoft defence once you are over the age of 18.

    To get an airsoft defence the law is that you should play at least 3 games of airsoft, and that you must have been playing for at least two months.
    You can still buy an airsoft gun without a defence, provided you are 18 or older. If you choose to do this we would, by law, two tone (paint in a bright colour) parts of your chosen weapon. This is because an airsoft gun is considered a RIF aka Realistic Imitation Firearm, because they are so close to the real steel, whereas when you paint parts of it in a bright colour it becomes an IF aka Imitation Firearm. The reason being that the bright colours make it look less realistic to the public, and therefor less likely to be mistaken as real, were it to be used for any other purpose than airsoft.

    When you order a gun from us you will need to add your defence details in the comments section of the cart. If you do not have a defence you will need to write the colour that you wish to be used for two toning your airsoft weapon.

    Here is what's stated in the VCRA (Violent Crime Reduction) Act:

    For airsoft skirmishing, the Association of British Airsoft is putting in place arrangements to allow retailers to check that individual purchasers are members of a genuine skirmishing club or site. The key elements of these arrangements are:
    1. new players must play at least 3 (three) times in a period of not less than two months before being offered membership
    2. membership cards with a photograph and recognised format will be issued for production to retailers
    3. A central database will be set up for retailers to cross-check a purchaser’s details
    4. member’s entry on the database will be deleted if unused for 12 months.
    The defence for airsoft skirmishing can apply to individual players because their purchase of realistic imitation firearms for this purpose is considered part of the “holding” of a skirmishing event.
    Size Chart