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The M5 .308 Assembled Upper Receiver comes with both the port door and forward assist hardware preinstalled. Forged from 7075-T6 aluminum, this assembled upper is precision machined to accept standard .308 components and is the perfect upper for your big bore build. Match this with our M5 .308 lower receiver for a solid and dependable fit.
Features:
M4 Feedramps
.2795 takedown pin holes (DPMS size)
Laser engraved T-marks
DPMS High Profile (.210) Tang)
Includes port door and forward assist
Includes:M5 .308 Assembled Upper Receiver in Anodized Black
Compatibility:Accepts standard DPMS .308 components
Q: Will a aero precision m5 upper fit my rainier arms rb308 lower?
Rainier Arms
12/04/23
A: It will!
J
Joe
Verified Reviewer
01/29/21
Q: Would this fit the 80% jmt ar10 lower receiver?
Rainier Arms
04/15/21
A: Yes
G
G. D.
Verified Reviewer
06/24/20
Q: Will this match up to an original Maten, (Mega arms), lower?
Rainier Arms
09/28/20
A: It will not.
R
RiverManPaul
Verified Reviewer
06/02/17
Q: Just want to make sure that this will work with the 1st Gen DPMS LR-308 lower receiver
A
Anthony M.
Verified Buyer
06/02/17
A: Yes it should fit just fine. It definitely is dpms pattern. Matching mine to the M5 lower created a seamless fit of course. In your case the only possible problem would be an aesthetic one.