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I bought this part after reading both the specifications that optics Planet says "will fit most m4, m16 and ar15 mil spec lowers". I also read the question people asked "will this fit an ar15?" and someone replied saying it will fit mil spec lowers. After receiving it I open the box to notice it has a retaining pin like the ones that hold the upper and lower together. At first I thought ok maybe the trigger guard goes under it for some sort of support....NO NOT AT ALL. Turns out if you look up any of the 3 part numbers on lancer's web page they clearly stated that this is only used with the La...
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by
Nick, member from Fl,
Verified Owner
from FL, United States
Written on September 23, 2025
Purchased this item for my AR. Optics planet’s description says “will fit MILSPEC lower”. BUT, it doesn’t. I later found out that it’ll only fit LANCER L15 lower receivers. A reviewer also suggested Optics planet update the description but that didn’t happen.
Best Used for:
Lancer L15 lower receivers only!
Would recommend: No
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by
Nick, member from Fl,
Verified Owner
from FL, United States
Written on August 30, 2025
Purchased this item hoping that it’ll fit my Sig and or Sharps lower. BUT NOOO! Doesn’t fit but, It’s okay though cause I’m keeping it. Planning on building either a 22 or 6mm ARC someday and will find a lower that’ll fit.
Pros:
well designed
Well designed , very strong and beautifully executed.
Cons:
Will not fit SOME lower
Best Used for:
Milspec lower if it fits
Would recommend: Yes
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by
Hunter,
Verified Owner
from KY, United States
Written on July 3, 2025
I personally messed up not reading the previous comments to this product and come to realize this would not fit on a standard ar15 lower. That doesn’t mean this isn’t a good product and I will not give a bad review based on that, this part is solid with no imperfections and would definitely fit on a lancer lower dedicated to this part. When the time comes i can afford the lancer lower or even find one it will definitely go on it.
Would recommend: Yes
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by
Jayce,
Verified Owner
from GA, United States
Written on October 27, 2024
An older concept that I found while looking through the internet, not that common and kind of expensive - but Lancer Systems L15 lower is quite nice. It comes with pieces for their AMBI bolt release and their own texturized mag release. It's a bit of a pain to assemble but once you do, it's honestly a good feel in your hands.
The magwell, it's replaceable - you push a pin (similar to the takedown pin) and you can slide the magwell out and put the new one in. The tactical seemed just right for me, I might get the competition just to have. A very nice piece, it's not loose - it doesn't rattle, and feels like it's a part of the lower.
HUGE NOTICE FOR THE LOWER - MAGPUL MAGAZINES ARE NOT COMPATIBLE. (At least for me, I've been using steel mags or aluminum mags.) I plan on buying some lancer mags to see if they fit.
Pros:
Functional
Fluid operation
Aestetically pleasing
Cons:
magpul incompatible
Best Used for:
Competition Shooting
Reloads
Would recommend: Yes
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