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BB 步枪
是时候减少使用二氧化碳弹药的时间,而将更多时间用于射击了。400e 是第一款也是唯一一款完全由电力驱动的全自动 .177 BB 枪,提供无与伦比的便利性。400e 聚合物一次充电即可发射超过 1,000 发子弹,因此您可以专注于射击而不是重新装弹。
400e Polymer 性能可靠,射击速度高达 430 fps。其供弹系统可确保流畅、不间断的射击体验。400e Polymer 的上、下、护手和仿制消音器均采用聚合物材料制成,使其成为一款经济实惠的选择,同时保持了与 400e Gen 2 相同的高品质内部组件。
This airgun comes with a 1 Year Limited Warranty, providing you with peace of mind and ensuring that your purchase is protected. Learn more.
This product is protected by U.S. Patent No. 12305954. Barra Airguns actively enforces its intellectual property rights.
⚠️ WARNING: This airgun is a replica firearm and must be handled responsibly. Do not display or use this airgun in public, as it may cause confusion or alarm. Never brandish or use this airgun in a threatening manner; doing so may be considered a criminal offense, punishable by fines or imprisonment. Do not alter the coloration or markings required by law to make it resemble a real firearm, as this is dangerous and may be illegal.
⚠️ WARNING: This airgun is not a toy. Adult supervision is required. Misuse or careless use may cause serious injury or death. Always read and follow all instructions before using. The purchaser and user should comply with all applicable laws governing the ownership and use of this airgun.
⚠️ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
⚠️ WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Operation
Materials
Accessories
Ammo Compatibility
The 400e Gen 2 Polymer is engineered to perform well with a variety of .177 caliber steel BBs, offering shooters a high degree of flexibility in their ammo choices. Its Standard barrel (equipped on all 400e Gen 2 Polymer rifles sold July 2025 and later) is designed for reliable operation across a broad range of BBs. This means it’s less sensitive to minor variations in BB size, shape, or surface finish, allowing you to shoot confidently with different brands without frequent jams or feeding issues. The Standard barrel is ideal for casual plinking, high-volume shooting sessions.
If you purchased your 400e Gen 2 Polymer between October 2024 and June 2025, your rifle came equipped with our Precision barrel. This barrel is machined to much tighter internal tolerances, delivering improved accuracy and consistency shot after shot. However, those tighter tolerances also make it more selective about ammo. To get the best results and prevent feeding problems in the Precision barrel, we strongly recommend using Barra Zinc-Plated .177 Caliber BBs, which are precisely machined and polished to meet the barrel’s specifications.
If you’re looking to upgrade or replace your barrel, we offer complete Standard Barrel Kits and Precision Barrel Kits. Whether you stick with the Standard barrel for maximum ammo flexibility or move to the Precision barrel to push the limits of accuracy, the 400e Gen 2 Polymer lets you tailor performance to your shooting style and goals.
Additional Info
The 400e Gen 2 Polymer is engineered to perform well with a variety of .177 caliber steel BBs, offering shooters a high degree of flexibility in their ammo choices. Its Standard barrel (equipped on all 400e Gen 2 Polymer rifles sold July 2025 and later) is designed for reliable operation across a broad range of BBs. This means it’s less sensitive to minor variations in BB size, shape, or surface finish, allowing you to shoot confidently with different brands without frequent jams or feeding issues. The Standard barrel is ideal for casual plinking, high-volume shooting sessions.
If you purchased your 400e Gen 2 Polymer between October 2024 and June 2025, your rifle came equipped with our Precision barrel. This barrel is machined to much tighter internal tolerances, delivering improved accuracy and consistency shot after shot. However, those tighter tolerances also make it more selective about ammo. To get the best results and prevent feeding problems in the Precision barrel, we strongly recommend using Barra Zinc-Plated .177 Caliber BBs, which are precisely machined and polished to meet the barrel’s specifications.
If you’re looking to upgrade or replace your barrel, we offer complete Standard Barrel Kits and Precision Barrel Kits. Whether you stick with the Standard barrel for maximum ammo flexibility or move to the Precision barrel to push the limits of accuracy, the 400e Gen 2 Polymer lets you tailor performance to your shooting style and goals.

LIGHTWEIGHT POLYMER BUILD
The 400e Gen 2 Polymer is constructed with durable polymer materials, offering a rugged yet lightweight frame for easy handling. The polymer upper, lower, handguard, and faux suppressor provide strength without the weight of metal alternatives, ensuring long-lasting performance at an affordable price.

HIGH-CAPACITY SHOOTING PERFORMANCE
Fire up to 440 FPS with smooth, uninterrupted action. The 400e Gen 2 Polymer's advanced feeding system ensures flawless shooting, offering over 1,000 shots on a single charge, so you can spend more time hitting your target and less time reloading or charging.

AMBIDEXTROUS CONTROLS FOR FLEXIBILITY
Switch between full-auto, semi-auto, or safe modes with the AR-15 style ambidextrous selector switch, designed for both left- and right-handed users. The ambidextrous magazine release and safety add to the ease of control for any shooter.

READY OUT OF THE BOX
Everything you need to start shooting is included. The 400e Polymer comes with a powerful 11.1V LiPo battery, USB balanced charger, 50-round magazine, and flip-up sights. Just charge the battery and you’re ready to hit the range.
LIGHTWEIGHT POLYMER BUILD
The 400e Gen 2 Polymer is constructed with durable polymer materials, offering a rugged yet lightweight frame for easy handling. The polymer upper, lower, handguard, and faux suppressor provide strength without the weight of metal alternatives, ensuring long-lasting performance at an affordable price.
HIGH-CAPACITY SHOOTING PERFORMANCE
Fire up to 440 FPS with smooth, uninterrupted action. The 400e Gen 2 Polymer's advanced feeding system ensures flawless shooting, offering over 1,000 shots on a single charge, so you can spend more time hitting your target and less time reloading or charging.
AMBIDEXTROUS CONTROLS FOR FLEXIBILITY
Switch between full-auto, semi-auto, or safe modes with the AR-15 style ambidextrous selector switch, designed for both left- and right-handed users. The ambidextrous magazine release and safety add to the ease of control for any shooter.
READY OUT OF THE BOX
Everything you need to start shooting is included. The 400e Polymer comes with a powerful 11.1V LiPo battery, USB balanced charger, 50-round magazine, and flip-up sights. Just charge the battery and you’re ready to hit the range.





Customize Your Rifle
With M-LOK®-compatible accessory mounts, this air rifle offers endless customization options
Versatile Stock with Integrated Battery Storage
Adjustable 6-position stock for a perfect fit, while the buttstock provides secure storage for your LiPo battery, keeping it easily accessible
Ambidextrous Control
Fully ambidextrous selector switch, magazine release, and safety
Durable Polymer Construction
Built with polymer materials for the upper, lower, handguard, and faux suppressor, the 400e Polymer offers a tough and lightweight design
50-ROUND MAGAZINE
High-capacity magazine designed for .177 caliber BBs
Specifications
View FAQ叮当响
.177 钢制 BB 弹
电的
选择火灾
2 FPE
430帧每秒
100发
5.2 磅
18英寸
32.5英寸
合成的
滑膛枪
平坦的
手动的
皮卡汀尼导轨
带 M-LOK 的聚合物
仿制抑制器
11.1V 锂聚合物 (LiPo) 电池、USB 平衡充电器、快速装弹器、100 发弹匣





