For the last 6-7 weeks I’ve been watching the BCM site for a complete upper (the BCM-URG-MID-16-BFH-ELW-KMR13) to come back in stock. I thought maybe the barrel was the reason for the delay but after seeing it was in stock I emailed BCM to see if they could provide an estimate on when the URG might be in stock. Below is the reply I received today:
"We are grateful for the overwhelming demand for the BCM® KMR and regret that we have not been able to keep up with this demand. The unique and proprietary alloy, with which we own 100% of domestic distribution, is in very short supply and has been the sole reason for sporadic inventory. Recent advancements from the BCM® Product Development Team have enabled the imminent release of several new BCMGUNFIGHTER™ offerings, including additional alloy options for the highly coveted BCM® KMR. This will enable us to raise KMR inventory levels quite a bit over the next 4 months. We are anticipating this inventory situation will be resolved by the end of this year.
It is our intent to close out 2015 with several exciting new products we are confident will exude the same quality BCM® customers have come to rely on, offered at more competitive prices. Thank you for your continued support and loyalty through often chaotic times. Please stay tuned to our Newsletter and social media pages for upcoming product announcements."
While I’d like the upper sooner rather than later the prospects of KMRs made with “additional alloy options” is intriguing. Hopefully there isn’t much variance from the current weight.
Now, let the conspiracy theories and rampant speculation begin.
Hmmm. Hopefully a Mod 1 stock is one of their products. I’m gonna start a rumor that they worked a deal with Hodge and are using the materials they’ve incorporated in his Mod 2.
The increase in weight over the Mg/Al KMR rails is 2.2oz (across all models). Given the small increase in weight and looking at the Mega/Hodge 7075 rail, I don’t expect that these are also 7075.
The difference in density between 6061 and 7075 are pretty minimal; 0.072 oz. per cubic inch. So, it’s possible in terms of raw weight, though looking at the cost, I think it’s relatively safe to guess that it’s a 6061 rail.
I do hope that they keep making the old Mg/Al rails, and yes, it would be neat for a 7075 version or even the new Li/Al stuff that Hodge is suppose to be using.
Thanks for sharing. I’ve be curious as to what was going on with the KMR inventor. I just got my first SBR stamp and have been waiting for one the 11.5" ELW KMR uppers. This explains a lot.
This might actually be perfect for my M&P Sport. I love the KMR on my BCM, but I wasn’t interested in putting $250 on top of a Sport… $170 is easier to swallow.
I had several builds planned with the original KMR, this throws my plans off a bit. I am still trying to source a 9" KMR for a 10.5" build. Looks like it will be even harder now. Yikes!
“We have every intention of continuing production of the current KMR. The new KMR Alpha will be an offering that will allow higher inventory levels and is only a VERY slight increase in weight. The current Magnesium/Aluminum alloy will continue to be available for the foreseeable future.”
This is what ive been waiting for but didnt think would ever happen. Ive never handled the original kmr but never thought the mag alloy blend was a great idea so this solves the only problem i had with it and its still extemely lightweight. Im definatley gonna snag one of these when theyre available
Damn! I didn’t know about this. These are still pretty lightweight, and very reasonably priced. I think I know what handguard my next AR will be sporting.
Sorry but basic imperial data and metallurgy makes it definitive that the alloy is stronger. This is actually something that’s been known in engineering for a long time and has been used by multiple industries for many years.
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