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Posted: 1/11/2016 5:17:11 PM EDT
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Anyone here care to share experiences with running LWRC uppers on non-LWRC lowers? Looks like the cheapest way to get into an LWRC, anyone just do it regardless?
Second question, is it worth it to get the M6A2 Stretch upper over the standard A2? |
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Sounds like you may be looking at one of those CDNN complete uppers...perhaps? I purchased an M6A2 carbine gas length version last year and attached it to a complete factory POF lower. It works perfectly, and it will work with most any other milspec AR15 lower. While the LWRC upper is somewhat proprietary in its piston design, the upper attaches to a milspec lower like most any other milspec upper. I live in the same city as CDNN and know the owner and some of the employees there. My M6A2 with POF lower...both purchased from them...would not drop the bolt from a locked back position when using the right hand side ambi-release lever. This is a long, very shallow lever to provide ambi-bolt drop on the right side. They had me bring it in to inspect it. After inspecting it they attached another upper to eliminate certain elements. The right hand bolt release started working. The upper they used was a new M6A2-S (stretch, with mid-length gas). They just left the upper on my rifle to be "nice". That right hand ambi bolt release is still not as smooth on the LWRC upper as it is on any of my other milspec uppers, so it's not the POF lower with this ambi release. Frankly, not a big deal to me as I can't get around the tried and true left hand release which has no issue on consistent bolt drop.
Now, as far as shooting characteristics between carbine and mid uppers go on the LWRC M6...frankly I can't tell much if any difference. I can actually tell a difference between my DI AR15's in carbine and mid gas in softer shooting with the mid gas...at least marginally. That's not to say my carbine gas M6 upper had any harsh recoil. It appears that at least with the M6 that the piston design doesn't get as noticeable an influence from the carbine or mid gas that a DI rifle provides...at least that's my finding. I'd say just go with the carbine gas upper. |
| And for the further confirmation on this particular question, it is irrelevant as to whether the lower is from a DI rifle or another piston platform correct? For example: I have a LaRue Predatar (DI) and a Sig MCX (piston). The LWRC complete upper would work on either lower correct? One additional question if I may: Any problems with that LWRC upper being of 6.8 SPC caliber? I have heard of feed issues with the 6.8 SPC conversion. Anyone tried this and if so, any problems or concerns to report? Thanks in advance. |
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Quoted:
And for the further confirmation on this particular question, it is irrelevant as to whether the lower is from a DI rifle or another piston platform correct? For example: I have a LaRue Predatar (DI) and a Sig MCX (piston). The LWRC complete upper would work on either lower correct? One additional question if I may: Any problems with that LWRC upper being of 6.8 SPC caliber? I have heard of feed issues with the 6.8 SPC conversion. Anyone tried this and if so, any problems or concerns to report? Thanks in advance. Don't know anything about feed problems with 6.8, as I've never owned or shot one...LWRC or otherwise. I notice CDNN is selling a bunch of those too. The LWRC upper will fit any milspec AR15 lower. Not sure on that MCX as it doesn't have a buffer...if I'm reading correctly...so I don't know how that will work out. Hopefully someone will chime in. I don't anything in the Larue specs that would prohibit the lower from attaching to the LWRC upper. |
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I've mixed LWRC M6A2 uppers with lowers from other builders often.
Put it on Sig516 lower, Troy Lower, Anderson lower. Works just fine. If anything the fit seems even a bit tighter than stock (this I like as the OEM fit between upper and lower on legacy LWRCs M6A2 was always too loose for my liking) |
| I run an M6A2 (5.56) upper on a host Spikes lower quite often. No issues with that combo. LWRCI recommends an H2 buffer with their uppers (they usually come with one). Note that the M6 series in 6.8 is different than the Six8. I believe the Six8 upper is machined differently for the wider Six8 magazines, and will not support the feed lips of AR-15 6.8 magazines in a 5.56 size lower. I don't know if a Six8 upper will work on a standard AR-15 lower. |
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Quoted:
I run an M6A2 (5.56) upper on a host Spikes lower quite often. No issues with that combo. LWRCI recommends an H2 buffer with their uppers (they usually come with one). Note that the M6 series in 6.8 is different than the Six8. I believe the Six8 upper is machined differently for the wider Six8 magazines, and will not support the feed lips of AR-15 6.8 magazines in a 5.56 size lower. I don't know if a Six8 upper will work on a standard AR-15 lower. The Six8 series is different than the standard AR15. A Six8 upper will not fit properly with a AR15 lower including LWRCs M6 series. The Six8 is a completely new design, including the magazines. I have not personally tried to fit my Six8 on my other lower though. |
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