4150 cmv listed on Buds. The S&W pdf file that is listed in the Buds ad says 4140 streel, I went directly to smith-wesson.com and they say it's 4150 with a chrome lined bore and chamber. ????

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Steve P. · Answer

It is 4150 with a chrome lined bore and chamber. I will let Buds know in the morning. The S&W site is correct.

Steve P. · Answer

Here is the full correct specs https://www.smith-wesson.com/firearms/mp-15-ts

Steve P. · Answer

Barrel Material: 4150 Steel/7075 T6 Aluminum

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4150 cmv listed on Buds. The S&W pdf file that is listed in the Buds ad says 4140 streel, I went directly to smith-wesson.com and they say it's 4150 with a chrome lined bore and chamber. ????