105-058
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What It Does
The Mk 1 Apex Grade Threaded Gunsmith Fit 5.00" Barrel is designed for the 9mm Smith & Wesson M&P. The barrel is NOT drop-in and requires fitting by a competent gunsmith. The stainless steel barrel features a 1:10” twist rate. The design increases accuracy performance making the M&P capable of shooting as small as a 1-inch grouping at 25 yards. Accuracy test results based on use of a mechanical rest. Final results may vary based on shooter ability, ammunition selection and variations in factory firearm tolerances.



Expected Results
– Direct replacement of factory 5.00" barrel
– Features 1/2–28 Threads
– Improves accuracy
– Optimal performance seen with bullet weights of 115gr. through 147gr. using 9mm jacketed ammunition
– Requires fitting by a competent gunsmith


Applicable To What Gun(s)
Works with all Smith & Wesson 9mm M&P pistols, including the M&P M2.0, requiring a 5.00” barrel.

In The Package
1 ea. Mk 1 Apex Grade Threaded 9mm Gunsmith Fit Barrel - 5.00"
1 ea. Thread Protector w/ O-Ring (installed)


Installation Resources
Apex M&P Barrel Fit Guide