SR v2 is a shorter revision of the original SR mount. It is roughly ½ inch shorter than SR v1 to better support low-back-pressure gas-gun suppressors and shorter, high-performance suppressors.
Compatibility:
- Suppressors designed for SR v1 (Dominus, Magnus, and 338 Ultra) will work on SR v2 brakes.
- The Spiro-SR only works on SR v2 brakes. It will not fit SR V1 brakes, which are too long.
Specifications:
- Caliber: .338
- Thread: 5/8x24
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