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BOLT Knights Armament SR-16 URX 3.1 Full Metal Recoil EBB Airsoft AEG Rifle (Color: Black)

ID: 52032 (AEG-B4-SR16-URX3-BK)
4.0 stars, based on 3 reviews
BOLT Knights Armament SR-16 URX 3.1 Full Metal Recoil EBB Airsoft AEG Rifle (Color: Black)
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BOLTKnight's Armament Airsoft


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Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.
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  • Knights Armament officially trademarked aluminum alloy receiver
  • CNC T6-6061 machined aluminum railed free float handguard
  • Realistic recoil feedback from the BRSS recoil system
  • Reinforced gearbox with heavy duty internal parts; CNC lightweight aluminum full tooth piston & piston head, BOLT steel enhanced gearset
  • High torque motor
  • Aluminum tightbore inner barrel
  • Adjustable stock
  • Full length top rail for optics
BOLT Airsoft's B4 Enhanced AEG features their Bolt Recoil Shock System (B.R.S.S.) to create simulated recoil for enhanced realism. In addition to the recoil system, BOLT has also greatly reinforced the gearbox and the rest of the internals to withstand the powerful recoil shock and to enhance the rifles durability and performance. Externally the rifle features a tactical CNC machined aluminum railed handguard, aluminum alloy upper and lower receiver, as well as all the familiar features of a traditional M4 / M16 weapons platform.

Manufacturer: BOLT Airsoft

FPS Range: 385-395

Color: Black


Length: 813mm - 889mm, Adjustable
Weight: 3600g
Magazine Capacity: 300rd Hi-Cap. Works with Tokyo Marui, Matrix, G&P and other compatible M4 Series Airsoft AEG Magazines
Gearbox: Ver 2 Full Metal, Fully Upgradeable
Motor: Long Type
Fire Modes: Semi/Full-Auto, Safety
Package Includes: Gun, Magazine, Vertical Grip
Battery: 7.4v / 9.6v PEQ box recommended (Wired to front w/ small Tamiya. Battery and PEQ Box not included)
Hopup: Yes, Adjustable

About BOLT

Bolt Airsoft excels in bringing realism to the Electric Airsoft rifle market through their patent pending Bolt Recoil Shock System (B.R.S.S. for short.) Their goal is to combine the advantages AEGs have such as performance, consistency, and reliability with the often sought after recoil impulse from a gas blowback system. This unique feature works by transferring the kinetic energy from the piston cycling to a weight system in the stock to generate the simulated recoil. Paired with high quality externals, Bolt Airsoft offers a line of excellent ready-to-play guns that also make for great starting platforms for project guns and upgrades.

3 Customer Reviews

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by Ryan M. on 12/29/2017
"I’ve had this gun for about a few months now and absolutely love it. Currently I’m doing some upgrades to make it that much better such as a new tightbore barrell cnc hop up new bucking spring all the good stuff. Only 1 thing the battery is kinda tight to fit a 9.6v butterfly would defiantly recommend a 7.4v lipo only because of the space and wire could get cut. But overall great product!
by Peter T. on 05/05/2015
"I have had this for a couple of months now and am quite pleased with it,
There are a couple of items that could be better, battery life is only a few hundred rounds so carry a spare if you are going war gaming with this, better make it two spares.
Also the battery is a tight fit, getting all the wires tucked away can be a bit of a challenge, doable but not easy.
The trigger on mine is a bit touchy in the semi position and locks up if you are not precise in your follow through, seems fine in auto.
All in all though I am quite happy, it recoils harder than a .22 version of an AR and I feel that it makes an even better trainer for this reason.
by Justin V. on 03/10/2015
"Between this. And the vfc. Being the only productiin sr-16 with correct lowers (not including trademarks)s. I chose this one due to the ebb/less work precived to get it running.

I am a skirmisher/airsmith, not just some guy that plinked down for a nice gun.

Out of the box i was rather impressed. Externals where about on par with g&p but noticed the finish on the urx3.1 rail scratches pretty easly.

Outside of externals. The ebb. It does accually kick. However. Not as hard as a gas in mag gbbr. (Feels harder then the erg, but not much). (Has nothing on my daytona gun fal)

On 9.6v batts the operation is sluggish. On 25c 11.1v its crisp but there is still room for improvement.

However. When accually shooting it...
Bbs hooked to the left badlly, and there was grease everywhere. Barrel, bucking, hop-up unit, and nozzle. And it wouldn't feed. Also was missing the steel flash hider, and spare wiring harness in mine. The hop-up chamber itself was missing one o-ring and had a miscut hop up nub. For $385.... Its pretty bad to have these quirks...... Not to mention not in the box. Shot okay after the degreasing of the chamber. Dropped the 6.0 barrel for a 6.03 tk twist. As mine was chronoing in at 347 fps on .2 out of the box. Now its a solid 200 foot gun.

Well... Almost. The bolt hi-torque motor is pretty much a wet ferrite motor. And pretty old tech. Going to replace with a neo magnet high torque.

Externals : 8/10
Internals: 5/10
Skirmishability 0/10 (10/10 after the rebuild)
Realism: looks good. Kick is good for an aeg 8/10

Would i buy one agian? Proboly not

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