JPRE-428
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| 5/8-28 TPI is NOT industry standard, but is appropriate for customs installations. The .875 outside diameter will accommodate medium to heavy contour barrels including, but not limited to, AR-10 type rifles and bolt guns. The JPRE-428 has a final exit hole of .281 and will accommodate bores up to .243/6mm. The final exit hole of the JPRE-428 can be enlarged to accommodate bores up to .416. |
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