The Mk 1 Apex Grade Semi Drop-In 4.25 inches barrel is designed for the 9mm Smith & Wesson M&P. Due to the tolerance variations in the M&P Slide, the barrel is semi drop-in. In some cases this means the barrel may drop-in without alteration, but in most cases will likely require minor fitting which is easily done by the end user. The stainless steel barrel features a 1:10 inches twist rate. The design increases accuracy performance making the M&P capable of shooting as small as a 1-1/2 inches grouping at 25 yd. 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.

Features:

Direct replacement of factory 4.25 inches barrel
Improves accuracy
Optimal performance seen with bullet weights of 115 grain through 147 grain using 9mm jacketed ammunition
Due to variations in factory slide tolerances, slight fitting may be required and is easily performed by the end user

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