Blackfin™ AR15/M16 Stainless Steel Lower Parts Kit: Complete, No Grip

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Product Overview

This kit offers high strength, corrosion-resistant components to start your custom build. Add your own grip to complete the ultimate custom built lower.

All Saltwater Arms components are high quality, 100% USA produced and manufactured. Each kit is guaranteed to fit your Mil-Spec dimension lower receiver.

  • Stainless Steel Bolt Catch
  • Stainless Steel Bolt Catch Roll Pin
  • Stainless Steel Bolt Catch Detent
  • Stainless Steel Safety Selector
  • Stainless Steel Selector Detent
  • Stainless Steel Magazine Catch Assembly
  • Stainless Steel Fire Control Group Pins (2)
  • Stainless Steel Takedown Pin
  • Stainless Steel Pivot Pin
  • Stainless Steel Pivot/Takedown Pin Detents (2)
  • Stainless Steel Buffer Retainer Pin
  • Stainless Steel Complete Spring Kit
  • Trigger Guard Assembly Anodized Black
  • Nickel Boron Coated Hammer
  • Nickel Boron Coated Trigger
  • Nickel Boron Coated Disconnector
  • 100% Made in America

Dealers: Please contact our sales team at for dealer pricing and volume discounts.


(2 reviews) Write a Review

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  • 5
    Blackfin Kit

    Posted by Chris Ridley on Apr 29th 2022

    This parts kit is a great addition to a serious build. The parts are all top quality, fit is correct and the trigger assy is very good. I liked it so much, I purchased more.

  • 4
    Great look & easy install

    Posted by Dustin Crowl on Mar 10th 2022

    These parts look great on my new 300 blackout and were very easy to install. The only issue I had was I had to file the magazine release because it was sticking. I would definitely recommend this kit.