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M16/AR15 Bolt - 9310 MPI (5.56) - Completion Kit - *Black Nitride*
M16/AR15 Bolt - 9310 MPI (5.56) - Completion Kit - *Black Nitride*

Our Price: $67.95
SALE PRICE: $49.99
Savings: $17.96

Stock Status :(Out of Stock)
Product Code: SBN158CK


M16/AR15 Bolt - 9310 MPI (5.56) - Completion Kit

Black Nitride

This is a complete bolt completion kit finished in Black Nitride.

This Kit comes with everything you need to complete your Bolt Carrier Group other than the Carrier itself. These are perfect kits to keep as a spare or backup for your BCG.

Our M16 / AR bolt completion kit comes with everything you’ll need to finish your rifle’s AR15, M4 or M16 Carrier. This premium backup bolt is a 9310 MPI spare bolt that perfectly fits the M16 and AR15 carriers and has a black nitride finish that provides increased corrosion resistance, natural lubrication and improved strength. When comparing 9310 vs 158 bolts, 9310 steel bolts provide a more reliable and durable base metal. The Melonite coating combined with 9310 steel is able to withstand more firings than the surface-hardened 158 steel bolts. Black nitride coating provides the smooth look and feel that also delivers the lubricity necessary for reliable functionality.

It’s important to always have back-up parts, especially a premium bak up bolt, in the event that you need a replacement or decide to upgrade your M16 or AR15 with a durable black nitride AR bolt. We offer competitive prices on our spare bolts and fast shipping on all orders. Order today while supplies last.


  • Machined from 9310 tool steel
  • Heat treated to military specifications
  • Shot Peened
  • MPI
  • Black Nitride Finish


  • Heat treated to military specifications
  • Shot peened
  • Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring
  • Black Nitride Finish

Cam Pin

  • Machined to Mil Spec
  • Ground to meet military required tolerances
  • Black Nitride Finish

Firing Pin

Built to Mil Spec

Average Rating: 5 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
Nice product August 12, 2016
Reviewer: Kyle Gross from Lubbock, TX United States  
Bought as a spare and it is a nice product and very quick shipping.

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