Trinity Force

Mil-Spec Carbine Buffer Kit

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Trinity Force MK-2 Mil-Spec Carbine Buffer Kit 

Upgrade your firearm with Trinity Force's Mil-Spec AR Receiver Extension Kit, a high-quality, durable component made in the USA. This top-quality kit features an aircraft-grade aluminum Buffer Tube with rolled threading and a hard coat anodized finish for maximum corrosion and wear resistance. The Action Spring, made from music wire with a zinc plate coating, provides optimal performance. The kit includes a 3oz Carbine Recoil Buffer, Steel Castle Nut, and Steel End Plate, making it a complete assembly kit for all Mil-Spec AR 15 lower receivers. It is also compatible with most AR 308/AR 10 rifles with modified buffer and spring requirements for proper operation. Trinity Force recommends installation by a competent, qualified gunsmith/installer to ensure the rifle is unloaded and pointed in a safe direction. This upgrade will elevate the performance of your firearm and provide you with reliable and practical components for years to come.


  • Made in USA 6 Position Buffer Tube
  • Made in USA Buffer Spring
  • 3oz Carbine Recoil Buffer
  • Steel Castle Nut
  • Steel End Plate

*Buffer and Buffer Spring Color May Vary*

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