Does 4 in barrel mean there is 4 in total, or 4 in and then the thread starts? Another way to ask this is will the threads be covered by a 4 in slide?

Question

Ethan C. · Accepted Answer

In this case, this barrel is for models with a 4&quot; factory barrel, so it the threading starts after the 4&quot; slide.

CiTY HuNTeR · Answer

It fits the 4-inch factory model, a.k.a. the M&amp;P Compact M2.0. The total barrel length extends a little over 0.5 inches comparing to the factory barrel.

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Does 4 in barrel mean there is 4 in total, or 4 in and then the thread starts? Another way to ask this is will the threads be covered by a 4 in slide? — 2 Answers