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BOLT Knight's Armament B4 SR16 URX3.1 Electric Recoil AEG - TAN

SKU: TSI-B4SR16URX3R-120T BOLT AirsoftOut of stock

  • - Officially licensed by Knight’s Armament
  • - Built-in Bolt Recoil Shock System (BRSS)
  • - Full metal receivers and outer barrel
  • - Licensed CNC-machined URX3.1 rail system
  • - Full metal receiver and outer barrel
  • - Rotary wheel one-peice hop-up unit
  • - High torque airsoft AEG motor
  • - Ambidextrous magazine relief
  • - Ergonomic textured handguard and motor grip
  • - Flip-up front and rear iron sights
  • - Adjustable Crane stock
  • - Steel flash hider included


BOLT Knight's Armament B4 SR16 URX3.1 Electric Recoil AEG - TAN

The Bolt B4 SR16 URX3.1 AEG Rifle is officially licensed by Knight’s Armament, the firearms company that manufactures the SR-25 designated marksman rifle (DMR). Whether you want to install angled foregrips, retractable bipods or pressure activated flashlights, an authentic URX3.1 rail system replica lets you build a fully custom setup. Internally, the Bolt SR16 URX doesn’t disappoint. The Bolt SR16 AEG features a patented Bolt Recoil Shock System (BRSS), which gives a realistic kick every time the rifle is fired. While this doesn’t compare to firing an actual rifle, this definitely adds to the overall realism and the feedback you’d expect when shooting with real steel. A high torque motor delivers excellent high rate of fire, and rotary wheel one-piece adjustable hop-up unit makes it easy to make adjustments quickly in between shots. In addition, a retractable crane stock stores bigger batteries compared to front-wired AEGs.

Ammo type: Seamless 0.20g or heavier (0.23g, 0.25g, 0.26g, 0.28g, etc) BBs. For maximum performance and accuracy, Airsoft Megastore recommends GoldenBall ProSlick BBs which carry perfect spherical consistency and density, available at Airsoft Megastore for the lowest price on the market, guaranteed.

Battery Charger Recommendation: Airsoft Megastore recommends the use of a smart charger to avoid overcharging the battery(overcharged batteries may cause decreased airsoft gun performance and may shorten battery life significantly). Smart chargers not only shorten charge time significantly (up to 800% faster charging), but more importantly, also automatically shut off once the battery is fully charged to avoid overcharged batteries.

In the Box

Airsoft rifle

high capacity magazine

flash hider

3X rail panels

instruction manual


Operation Electric Automatic
Build Metal Upper / Lower Receiver, Rail System, Mock Gas Block, Outer Barrel, Buffer Tube, Sights / Polymer Stock
Firing Modes Semi-automatic, Full-automatic, w/ Functional Safety
Muzzle Velocity 395 – 415 FPS (w/ 0.20g BBs)
Gearbox Full Metal Version 2 (w/ Bolt recoil system)
Magazine 300rd High Capacity (gear wind-up)
Battery 11.1V LiPo Nunchuck (not included)
Inner Barrel Length 363 mm
Hop-Up Adjustable
Weight 6 lbs
Overall Length 33.5" in. / 35" in. (Retracted / Extended)

California Proposition 65 Warning: Cancer and Reproductive Harm -

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