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Posted: 1/2/2011 6:55:17 AM EDT
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I got a very lightly used Bushmaster 14.5" upper with an 1:9 twist H-Bar in a trade recently. I am likely going to get a Vortex FH to make it legal in length vs going the SBR route.
I have a bud that has an AR vise so I can hopefully remove the existing FH without much issue. Anyone know or already have the data to support how I can confirm the thread pattern on my barrel so that I can order the proper Vortex? Thanks! |
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Most sites will tell you what they are for. Use the one that is called 5.56 or model 1001v. Its 1/2-28 thread. I'll post a few sites:
PK The $48 one near the bottom. Smith Enterprises The 1001v. Rainer "The Vortex can be permanently attached to the new 14.5″ M-4 barrels the result is a barrel with an over-all length of 16.1″." Midway (Out of Stock, but it's the same one for 5.56 - model 1001v) |
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You're welcome.
This $52 Drilled Smith Vortex at PK (towards the bottom of the page) is the same thing, but has the hole drilled for a pin if that is what you prefer. Not really needed if you are sending it somewhere to get it done. |
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