MK12 MOD 1 SPR Collar
This longer collar was designed for use on MK12 Mod 1 rifles. It has an internal step that interfaces with a step in MK12 barrels that prevents rearward movement. The set screw, typically positioned on the bottom prevents rotation.
![Hornady Precision Hunter .270 WIN, 145gr, ELD-X - 20 Rounds [MPN: 80536]](https://www.tacticalwatchstore.com/wp-content/uploads/2026/10/hornady-precision-hunter-270-win-145gr-eld-x-20-rounds-mpn-80536.webp)
