Zenitco Recoil Spring Mechanism for the B-33
Genuine Zenitco | Return spring mechanism for the B-33 receiver cover rail | Steel | Spare part
In short: this is the genuine Zenitco return (recoil) spring mechanism for the B-33 receiver cover rail. It is the sprung steel assembly that tensions and holds the B-33 cover in place, so it is the exact spare to keep on hand if the original wears out or is lost during installation.
Overview
This is the return spring mechanism supplied with the B-33 receiver cover rail, sold separately as a spare.
The B-33 does not use the standard spring assembly: it needs its own, because the rear stop and the guide are shaped to lock the aluminum cover in place rather than a stamped one. That is why the part is not interchangeable with a factory spring.
A spring that has taken a set will let the cover sit loose and will let an optic drift off zero. Replacing the mechanism restores the original tension without touching the rail.
| ✓Zenitco Recoil Spring Mechanism | x 1 |
Compatibility: designed for the Zenitco B-33 receiver cover rail. It is the exact factory return-spring assembly for that cover. Check that your setup uses the B-33 before ordering.
Key Advantages
- Genuine Zenitco return spring mechanism for the B-33
- Sprung steel assembly that tensions and secures the cover
- Supplied with the fixing caps needed for installation
- Exact factory replacement spare part
Technical Specifications
| Brand | Zenitco |
| Part Type | Return (recoil) spring mechanism (spare part) |
| For | B-33 receiver cover rail |
| Material | Steel (spring steel) |
| Includes | Return spring mechanism + fixing caps |
| MPN | B-33-RSM |
| Condition | New |
Frequently Asked Questions
What is this part for?
It is the Zenitco steel return (recoil) spring mechanism that tensions and holds the B-33 receiver cover rail - a spare so you always have a working assembly.
Which product does it fit?
The Zenitco B-33 receiver cover rail. It is the factory return-spring assembly for that cover.
What does it include?
The return spring mechanism together with the fixing caps used to install it.
Can I use a standard return spring with the B-33?
No. The B-33 uses its own mechanism, with a rear stop and guide shaped for the aluminum cover.
How do I know the spring needs replacing?
If the receiver cover seats loosely or a mounted optic drifts off zero, the spring has taken a set.
Is this a genuine Zenitco part?
Yes - it is an original Zenitco spare part with guaranteed US delivery.
Keep your B-33 working - order the genuine Zenitco return spring mechanism spare.
In Stock | Guaranteed US Delivery | Genuine Zenitco Part
General
Brand
Zenitco
Manufacturer Part Number (MPN)
Recoil spring mechanism (B-33)
Condition
New
Intended Use
Range sports / Training
Material
Steel (spring steel)
Color / Finish
Steel (natural)
Mounting & Rails
Mounting
Designed for the Zenitco B-33 receiver cover rail; exact factory return-spring assembly
Rail Type
Sprung steel return mechanism that tensions and secures the B-33 receiver cover; supplied with fixing caps; factory spare
Function
Zenitco steel return (recoil) spring mechanism spare part for the B-33 receiver cover rail
