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Q&A for Trinity Force Mil-Spec Buffer Tube Kit — 13 Questions & 12 Answers

Name Trinity Force Mil-Spec Buffer Tube Kit (4.3)
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Q
RiveraRay, guest, from AZ, United States, asked on October 07, 2019

Is this 7075 Aluminum?

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on October 16, 2019

It is 6061-T6.

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Q
Jaden Garrety, guest, from TX, United States, asked on October 01, 2019

Would this fit with a SBA4?

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on October 16, 2019

Yes, it will work with the SBA4 brace as that uses a mil-spec receiver extension.

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Q
Snapperhead, guest, from FL, United States, asked on August 30, 2019

Will this fit the rock island armory VR80 12 gauge?

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on September 13, 2019

We do not currently have this information available. Please contact Rock Island regarding buffer weight and spring compatibility.

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Q
Tony, member, from TX, United States, asked on June 11, 2019

What about 300 blackout would this kit be Okay?

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on September 13, 2019

Yes, it would. However you may want a different buffer weight depending on your ammo selection. The included carbine weight buffer would work well for subsonic ammo, but an H3 buffer would be a better option for supersonic ammo.

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Q
Wolfe, guest, from OH, United States, asked on April 30, 2019

will this fit a AR15 SBR Pistol.

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on September 13, 2019

Yes, it will.

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Q
Potchkins, member, from AR, United States, asked on November 29, 2018

Is the tube 6061 or 7075 ?

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on April 12, 2019

It is 7075.

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Q
Patrick, guest, from TX, United States, asked on November 05, 2018

Will this fit AR10/LR308? What is the length of this buffer tube?

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on April 12, 2019

It is a carbine length mil-spec buffer tube which would fit an AR platform 308, however the included buffer and spring would not be correct for 308. Here is a link to a comparable kit that is correct for 308:

https://www.opticsplanet.com/guntec-usa-ar-10-mil-spec-buffer-tube-set-308-cal.html

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Q
Mike98, guest, from LA, United States, asked on August 12, 2018

Is this buffer tube compatible with a magpul stock?

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on October 03, 2018

It is compatible with ANY stock that is a mil-spec buttstock including any of the mil-spec Magpul stocks.

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Q
JDMjosh, member, from PA, United States, asked on June 03, 2018

Is this carbine rated?

Expert Answer
A
Answered by Jonathan D., Gear Expert, from IL, United States, on July 19, 2018

The mil-spec buffer tube kit is carbine length and includes a standard 3oz. carbine buffer.

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Q
WILLIAM, member, from NY, United States, asked on May 10, 2018

Will this buffer tube be compatible with the Hogue AR15/M16 Kit, Finger Groove Beavertail Grip and OverMolded Collapsible Buttstock?

Featured Answer
A
Answered by Poorboy, guest, from TX, United States, on May 11, 2018

Buffer tube has nothing to do with the pistol grip. You need to check if stock is mil-spec or commercial. This is size of outer diameter of buffer tube not a spec/rating. Some buffer tubes are mil-spec and some are commercial. Keep it simple mil-spec stock for mil-spec tube and ofcouse vise versa. Buffer tube in question states that is mil-spec size.

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Last updated 2025-11-12 UTC.