The Mk 1 Apex Grade Gunsmith Fit 4.25" 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.
– Direct replacement of factory 4.25" barrel
– 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 4.25” barrel.
In The Package
1 ea. Mk 1 Apex Grade 9mm Gunsmith Fit Barrel - 4.25"
Note: This service requires the complete firearm to be mailed to us. The firearm can only be shipped via UPS or Fedex. Please download and print a copy of our FFL here. Please include a copy of your drivers license when shipping firearms to us.
Mailing address is
Legion Precision LLC
1300 South Litchfield Road Ste A2015
Goodyear, AZ 85338