What's the Difference Between these Side Folders Trunnions Anyways?
by ReCreator Blanks
July 17, 2023
![](https://static.wixstatic.com/media/ad95df_ceb1992d567246e79e9168c575ace8d8~mv2.jpg/v1/fill/w_147,h_75,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/ad95df_ceb1992d567246e79e9168c575ace8d8~mv2.jpg)
When purchasing a side folder trunnion, you should make sure that you know the difference between a 5.5 mm Commercial and 5.5 mm Military trunnion (plus a 4.5 mm if need be). Here is what happens when you end up using the wrong trunnion:
![](https://static.wixstatic.com/media/ad95df_10b2f43fe1e64e37b475bd745dc2ea72~mv2.png/v1/fill/w_49,h_28,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/ad95df_10b2f43fe1e64e37b475bd745dc2ea72~mv2.png)
As you can see, the 5.5 mm Commercial trunnion installed in a 5.5 mm Military receiver blank will not align correctly.
![](https://static.wixstatic.com/media/ad95df_557773b76c024972903fe1e33714a389~mv2.png/v1/fill/w_49,h_28,al_c,q_85,usm_0.66_1.00_0.01,blur_2,enc_auto/ad95df_557773b76c024972903fe1e33714a389~mv2.png)
However, when the 5.5 mm Military trunnion is installed in the 5.5 mm Commercial receiver blank, everything is aligned properly. Now you may be wondering, "How do I tell apart these side folder trunnions?"
Let's take a closer look at these small but significant differences.
![](https://static.wixstatic.com/media/ad95df_916abe7df0ad4fa081b6ec31ca9337ee~mv2.jpg/v1/fill/w_147,h_84,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/ad95df_916abe7df0ad4fa081b6ec31ca9337ee~mv2.jpg)
On the left, we have the 5.5 mm Commercial trunnion that was used in the examples above. With these trunnions, they tend to have a grayer hue than the Military trunnions.
![](https://static.wixstatic.com/media/ad95df_7870e017abdb4049b241cd13e024776d~mv2.jpg/v1/fill/w_147,h_71,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/ad95df_7870e017abdb4049b241cd13e024776d~mv2.jpg)
This cutout is also a tell-tale sign that you have a 5.5 Commercial trunnion.
![](https://static.wixstatic.com/media/ad95df_d7037633e2fe49eb85d86c6c27be99ed~mv2.jpeg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/ad95df_d7037633e2fe49eb85d86c6c27be99ed~mv2.jpeg)
On the right, we have the 5.5 Military trunnion. Unlike their brother Commercial trunnion, they present a deeper, blacker tone.
The 4.5 mm will of course, have a 4.5 mm pin.
![](https://static.wixstatic.com/media/ad95df_005144a67a2440bbb6a1309a8023dcd4~mv2.jpeg/v1/fill/w_147,h_77,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/ad95df_005144a67a2440bbb6a1309a8023dcd4~mv2.jpeg)
![](https://static.wixstatic.com/media/ad95df_54016c187e2e40fe8baf646695cba70a~mv2.jpeg/v1/fill/w_147,h_83,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/ad95df_54016c187e2e40fe8baf646695cba70a~mv2.jpeg)
Hopes this give you a better understanding of these Side Folder Trunnions.
You can purchase yours today at www.recreatorblanks.com!