Cut LMT piston barrel 12” or 12.5”

April 03, 2020, 09:32 AM

Jasper1323

Good morning,
I hope everyone is safe.
I would like to know from the group if anyone has a shortened MRP barrel. If so what length is it? If I go 12” vs 12.5” is this going to cause a problem if I decide to run a suppressor?

Thank you in advance.

April 03, 2020, 12:17 PM

M4Super90

Depends on how the suppressor is mounted. I can't use an AAC QD mount on my 12" because the teeth block the removal of the piston from the front.

April 03, 2020, 09:06 PM

nhracecraft

Cut it to 12.5", You'll thank me later!

Like 'M4Super90' states, it will depend on which Supressor/Mount you go with.

I know the SilencerCo ASR Mount and the DearAir Key Mount Flash Hider do work, but it's pretty tight. If you have the choice, an extra 1/2" beyond the std 12" BBL Length will provide add'l clearance and make it easier to remove the Piston Plug for cleaning.

The following thread has a bunch of info / clearance data that I put together for another member that had some similar questions re: the LMT 12" Piston Upper. The OP changed the title of the thread to 'Removed' and deleted his original post (why, I have NO idea!

), but all of the important info is there. Hope it helps!

https://sigforum.com/eve/forums...490035154#8490035154

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April 03, 2020, 10:40 PM

Jasper1323

Great thanks!

April 03, 2020, 11:14 PM

CPD SIG

https://lmtdefense.com/parts/l7mc1b

Why cut?
That's the beauty of LMT's; two bolts out, new barrel in, two bolts back in, and you're in business!

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April 04, 2020, 09:06 AM

David W

quote:
Originally posted by CPD SIG:
https://lmtdefense.com/parts/l7mc1b

Why cut?
That's the beauty of LMT's; two bolts out, new barrel in, two bolts back in, and you're in business!

I'm going to guess and say cost, same thing for me when I chopped my SCAR barrel. $100 vs $1000