LMT 308 receiver extension and A5 buffer

[AAMP84]

Is anyone running this setup? I picked up an LMT 308 receiver extension after reading that it was gtg with the A5 buffer setup. But there is a slight difference in length between the LMT and VLTOR RE-A5 tube. Will this cause any functioning issues?

[Clint]

It should not cause any issues.

Always verify proper bolt catch over travel of ~1/4".

[JediGuy]

That’s what I used, worked fine.

[Leuthas]

It should not cause any issues.

Always verify proper bolt catch over travel of ~1/4".

This, and press the BCG into the installed receiver extension to verify there's about 1/8" between the lower receiver and the rear of the gas key. Sort of the same check, but nice to have to points of reference.

[Hammer_Man]

I used this combo before. I didn’t measure anything, but it seemed to function just fine.

[Todd.K]

The important measurement is the inside depth, not the outside length.

[AAMP84]

The important measurement is the inside depth, not the outside length.

Yeah, the difference internal length is the same as the external.

[pointblank4445]

Yeah, the difference internal length is the same as the external.

That was not the case from the tubes I had. Externally was shorter and internally was shorter as well.

In a 5.56 build, when drawn all the way to the rear the travel for the BCG was significantly less. Could it run?...yes. Did it function the same as a BCM/Vltor buffer tube?...no.

[AAMP84]

That was not the case from the tubes I had. Externally was shorter and internally was shorter as well.

That’s what I meant, I just phrased it poorly. The internal length on the LMT is shorter by about the same amount as it is externally.

[pointblank4445]

That might have been me...thought I read it as the internal is the same as the non-LMT tube.


I have a big, long-winded post about it on P&S or lightfighter I think.

Internal was 1/8" short; external was 1/16" +/- IIRC