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$299.99
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Shipped & sold by Pyramyd AIR
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 28 Barra 400E Polymer Reviews

The Best BB Gun Ever! Sights are not great. Easily remedied with spare parts I had (red dot).

I’ve been using my Barra air gun for a while now, and I have to say, it’s been a solid performer across the board. Right out of the box, the build quality impressed me—it has a sturdy, well-balanced feel without being too heavy. The design is sleek and functional, giving it a professional look that’s rare in this price range. Accuracy is where the Barra really shines. Whether I’m plinking in the backyard or doing some light target practice, the consistency and precision are spot on. It’s surprisingly powerful for an air gun, and the shot velocity is more than enough for its intended use. I also appreciate how easy it is to load and maintain. Overall, I’d highly recommend this air gun to anyone from beginners to experienced hobbyists. It’s reliable, well-built, and offers great performance at a fair price. Barra really did a great job with this one.

When I first began my research on the 400e, it seemed that the biggest issue was the BB feed jamming. However, I soon realized that it was largely a function of BBs that weren't consistently shaped/round. Still I was hesitant but then the Gen2 came along and the BB filter eased my mind that jams beyond the magazine could likely be cleared w/o having to send the gun back in. This gun is so fun! Makes it fun to shoot again just to see how they would break apart from the automatic mode. Smile on my face the entire time!

Now having 100 BBs in the magazine and not 25 and not running out of CO2 in the middle of a shoot is wonderful.

My gun arrived day before yesterday and I almost have not set it down since. I ordered an extra battery right off the get cuz I had a feeling that's how it would be. This thing is a blast no pun, well actually pun intended

It is awesome not to constantly load co2 cartridges anymore electric rocks!

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!
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May 13, 2025
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Jams all the time. Not well made. Should be reliable for the price