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Trinity Force Mil-Spec Buffer Tube Kit for AR15 Series Rifles

ID: 58647 (ACC-MNTLU04B)
Trinity Force812530024612MNTLU04B58647
4.0 stars, based on 2 reviews
Trinity Force Mil-Spec Buffer Tube Kit for AR15 Series Rifles
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Trinity Force


MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
The Trinity Force Mil-Spec 6-position tube assembly is constructed from aircraft grade aluminum with rolled threading. The buffer tube has been hard coat anodized for maximum corrosion and wear resistance. A standard buffer spring and 3oz carbine buffer are included as well as a castle nut and lower receiver end plate.This assembly kit will fit on all Mil-Spec AR 15 lower receivers. It is also compatible with most AR 308/AR 10 rifles but requires a modified buffer and spring for proper operation.


  • Aircraft grade aluminum buffer tube
  • Hard coated anodized finish
  • Includes standard buffer spring and 3oz carbine buffer
  • Anodized castle nut included
Compatibility: AR15 and other compatible firearms
Material: Aicraft Grade Aluminum, Spring Steel, Polymer

Manufacturer: Trinity Force

2 Customer Reviews

(Write a review)

by Francisco C. on 05/18/2016
"Cool kit for those with a gbbr. Used this for my WA gbbr m4 franken gun. You can use the complete kit, even the spring. Good recoil, heavier buffer, higher fps, but the spring slaps around in the tube and it's loud. I would recommend it for your gbbr not sure about real steel. I bought two and would buy again if I get another gbbr.
by starr t. on 01/03/2017
"Got this for my Ra-tech custom WE-m4. Sadly it doesn't work with the Ra-tech 2015 steel bolt or the older Ra-tech steel bolt. The BCG binds about 20% of the time and it requires you to either smash the forward assist or bang the stock on the ground to send the bolt forward. However it works wonders with the WE stock bolt.

Pros: Great build quality.
nice and hefty buffer.
great buffer spring.

Cons: The inner diameter is slightly smaller then an actual milspec buffer tube.
the inside of the buffer tube has small ribs along the inside which can cause
binding with some bolts.

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