which is milspec and which is commercial?

S

Sevensixtwo

Regular
Rating - 100%
50   0   0
Location
West coast is the best coast
I have a tapco sks, a VLTOR modstock on my m14 and a mossberg 500 tactical. all have adjustable stocks. At first i didnt think they were interchangeable but it just required some wiggling. Does anyone know which ones are milspec and which ones are commercial??
 
Last edited:
The biggest differences between the two tube types are: 1) The buffer tube diameter itself 2) The diameter of the threads in relation to the diameter of the tube.

Mil-Spec: On the mil-spec buffer tube… the threads at the front are actually a larger diameter than the rest of the tube itself. In manufacturing, a large tube is used and threads lathed as normal. Next, the rest of the tube must be milled down to the military specified diameter. I’m guessing this step requires more work / precision… and costs more.

Commercial-Spec: In manufacturing, you begin with a tube that matches the final tube diameter. The threads are cut into the front end with a lathe just like any other threaded pipe. I imagine this to be just like the copper water pipe used in my house. Cheap & simple.

So when shopping for a stock… make sure to get the same type as your buffer tube. And make sure to get a buffer tube that will work with your Lower Receiver. I did read that you can use a commercial buffer tube in a receiver made to Mil-Spec… but the threading grip may not be as tight and could fail. If the Lower I choose is cut to Mil-Spec, I will definitely make sure my buffer tube and stock are as well.

Buffertube_Specs.jpg
 
Tapco extension tubes are commspec

If I had to guess the vltor is probably milspec

The mossy is probably commspec

Don't quote me on the second and third.
 
Do not force a milspec onto a commspec tube. Try all the stocks on the Tapco and see which ones fit.

Commspec will fit on milspec but will rattle and fit loose
 
You must log in or register to reply here.
Back
Top Bottom