Adjustable 6-Level Bipod with RIS Rail Adapter [Rokstad]

These bipods are super high quality. The materials are thick and resistant but overall, the bipod remains reasonably light.
Be careful as the legs "snap" into place pretty violently and with a lot of strength, so opening and closing them often carelessly could eventually wear out your picatinny or deform your replica.

If you are doubting between buying the 6 or 11 position bipod, I'd say the shorter one has the perfect size for lying down with a m4 stlye replica, while the 11 one is better for shooting standing up, from a ledge for example.

"This bipod is an excellent addition to any replica setup, offering both functionality and premium quality. The material used feels robust and durable, ensuring long-term reliability even under extensive use. Its solid and stable construction provides incredible support, giving you confidence during every shot. The ease of attachment makes it user-friendly, allowing quick installation without hassle. Adjustability is another standout feature, as the bipod can be effortlessly customized to meet the shooter’s specific needs. The rubberized feet add an extra layer of stability, preventing unwanted movement and keeping the bipod secure on various surfaces. This thoughtful detail ensures optimal performance whether you're on uneven terrain or a smooth surface. Overall, this bipod perfectly combines practicality, durability, and convenience, making it an outstanding purchase for anyone looking to enhance their shooting experience. Highly recommended!"

Sturdy bipod with a good degree of movement.
Not cumbersome and adds very little weight to the replica.
Easy to deploy and fold under the replica with easy to use height adjustment that has spring for quick deployement