Will let you use any Remington 870 & Rem870 Knoxx stock or Magpul shotgun stock on semi & pump most turkish shotguns 12ga shotguns.
Hatsan
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ATA
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Uzkon
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Derya
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churchill
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Cunuck
CNC machined from 6061T6
Type III finish
CNC milled 416 Stainless Nut