Trinity Force

Trinity Force Stock Lock Insert

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  • Trinity Force Stock Lock Insert
  • Trinity Force Stock Lock Insert
  • Trinity Force Stock Lock Insert
MSRP: $8.00
— You save $3.05


Trinity Force Stock Lock Insert

The Trinity Force AR Stock Lock Insert is designed to quickly and securely convert any stock to the locked position. With a tight fit and indication markers simply cut the notch to fit the desired length, place in buffer tube and assemble stock in place.  To retain original configuration simply remove the stock and locking insert. It's as simple as that. For your safety, Trinity Force recommends this part be installed by a competent, qualified gunsmith/installer with an understanding of the weapon platform that the part is being installed on. Always make sure the firearm is unloaded and pointed in a safe direction when working.


  • Quickly locks any standard stock configuration
  • Fits standard 6-position MIL-SPEC buffer tubes
  • Durable lightweight design with placement indicators
  • Made from heat resistant rubber and fits tightly in place
  • Quickly and easily reversible


  • Length (in): 3.5
  • Material: Heat Resistant Rubber
  • Weight (oz): 0.11
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