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$299.99
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1-year limited warranty
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Description
The Barra 400e Polymer Full Auto BB Rifle is budget friendly brother to the 400e Gen 2. By replacing the upper, lower, handguard, and faux suppressor with polymer materials, Barra is able to offer a lighter and more affordable option to the original 400e Gen 2 without sacrificing performance.
This BB rifle receives all of its power from a Lithium Polymer (LiPo) battery. It reaches velocities up to 430 FPS and a cyclic rate of approximately 550 rounds per minute (RPM) to deliver intense action and limitless enjoyment for plinking and fun target practice.
The heart of this BB gun is the Lithium Polymer battery that provides consistent power and operation compared to the CO2 cartridges found in competing airguns, meaning it performs well over long shooting sessions and in a variety of temperatures. With the ambidextrous select-fire switch, this BB gun easily shifts from semi-auto to full-auto (and safe mode), allowing shooters to either get semi-auto shots for careful placement, or to empty the 100-round magazine in just over five seconds with exciting full-auto shots.
The Barra 400e Polymer Full Auto includes flip up front and rear sights that can be removed and repositioned. In addition, the rear peep sight is adjustable for windage, and the BB gun has a long Picatinny optics rail for adding a scope. To provide further options, the Polymer handguard has M-LOK slots on the bottom and both sides for accessories such as bipods, flashlights, and lasers.
This BB gun has an AR-style textured pistol grip and a custom 6-position adjustable butt stock for variable length of pull. For convenience, the butt stock includes a quick-disconnect sling mount, and the package comes with both a balanced battery charger and a speed loader to make filling the magazine simple.
To get a truly unique and exhilarating AEG BB gun shooting experience, buy the Barra 400e Polymer Full Auto BB Rifle from Pyramyd AIR today.
Barra 400e Polymer Full Auto BB Rifle
- Automatic electric gun (AEG)
- Full-auto/semi-auto
- Uses .177 caliber steel BBs
- Polymer upper, lower, handguard, and faux suppressor
- 100-round magazine
- Over 1000 shots per charge
- Approximately 550 rounds per minute
- Max. velocity: 430 FPS
- Textured AR-style pistol grip
- Manual safety
- Picatinny optics rail
- Flip up front post sight
- Flip up windage-adjustable rear peep sight
- Custom 6-position adjustable stock
- M-LOK accessory slots on sides and bottom of handguard
- Quick-disconnect sling mount
- Combo Includes battery, balanced charger, and speed loader
- Barrel length: 18"
- Overall length: 32.5"
- Weight: 5.2 lbs.
Specifications
Overall Rating
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10 of 22 Barra 400E Polymer Reviews

Over a 1000 rounds no problem. Fun fun, eats cans up. I was surprised how much power this has. Even destroyed a old thick coffee can like butter. I was not to sure about it but figured I would try it out. Most fun I have had with a bb gun. Very accurate as well.

Having a blast. Dead on it to 40yds. About a 5ft drop at 80yds but on full auto i am hitting and hearing a flurry of reports on target. Jammed a few times and the culprit was always my old bbs I was trying to burn up. I started swabbing the feed ramp every 1000rounds and only use your ammo and It has been flawless for about 6000 rounds now.

Wow!! I suppose I should elaborate. I opted for the Polymer version of the 400e, and I couldn't be happier with my choice. The craftsmanship and quality is immediately noticeable. I think the rifle is perfectly balanced and feels great in my hands. The power and accuracy are amazing! Great job Barra!

Honestly I shoot it everyday it's a blast everyone I've let try it loves it I've had CO2 versions and honestly I think I spent just as much on BB's as the CO2 because it's so much fun to shoot especially a hundred shots. I hope they come out with a drum mag with like a thousand change up the look and keep the fun going. I would definitely recommend and would buy it again .

I'm trying to return my 400e gen 2 polymer. The sights that were included weren't any good but I replaced those with a 'red dot' sight. It is accurate enough and very fun to shoot. I really like it. But even using quality Black Diamond BB's it jams often. The new collar thing to catch bad bb's before they get to the barrel works too well and few bb's will pass through. As fun as this thing is when it lets bb's through, it cost too much to spend most of my time unclogging the thing.

I've only had this rifle for a couple of weeks. I put about 500 rounds to it. Without a hiccup. I can't seem to get the sides to adjust quite properly though. Other than that it's been great.

I own a couple of different air rifles, but I just found out a couple of weeks ago about the fully automatic Electric polymer air rifle. After watching reviews on YouTube, I decided to go ahead and pull the trigger. I've only had it for a couple of days now. But I am impressed. I shot three full magazines through it. Without a hiccup. The quality of this gun feels very good. I love the pop-up sites. They say it is a polymer material. But it feels very strong and very high quality. Good job bara

This thing is my childhood dream come true! I spent my youth shooting an AR style pump up BB/Pellet gun and always wished there was something like the 400E. I got the polymer version, and while I can't compare it to the metal version, this thing has a good weight to it and is built like a tank. The sights are also SUPER easy to adjust. The only thing I could complain about is I wish there was a higher capacity magazine. 100 shots is a lot, but it would be great if we could eventually get capacity up there with the gel blaster/orbee guns. This thing is just a total blast to play with, but don't misunderstand, it's definitely not a toy! You could put the hurt on an intruder if you lit their face up on full auto! Lol

Not sure one bb made it through,keeps jamming up. I boxed it for a return, tried multiple times.
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Apr 18, 2025
By Rob
It is awesome not to constantly load co2 cartridges anymore electric rocks!