E3 Arms Omega 15 Gen II AR15 Complete Multi Caliber Lower Receiver

The E3 Arms Omega-15 GEN II is a premium, multi-caliber AR-15 polymer lower receiver engineered for the acceptance of mil-spec components and works on any AR-15 upper receiver!
Milled from a proprietary variant of glass-filled nylon-6, the OMEGA-15 multi-cal lower receiver is more resilient to damage than traditional aluminum lowers. Durable & lightweight — with exceptional structural integrity and excellent chemical resistance — these E3 GEN II receivers have been proven on training ranges with round counts of 50-97k cycled through with no issues.
The E3 Arms Omega-15 GEN II AR-15 complete multi-caliber lower receiver — continuing to exceed expectations and redefine the standards for what an AR polymer lower receiver can be. 
Features
Milled from premium, glass-filled nylon-6 polymer
Winter/over-sized trigger guard
Improved ergonomic grip w/ trap door
Polymer buffer tube with 6-position collapsible/adjustable stock
Fire controls require no lubrication
Castle nut has been factory torqued and staked
Lighter & stronger than aluminum — can be run over at the magwell without being crushed
Retains color when scratched — scratches can be removed with WD-40 and a green scratch pad
New to Gen II: Reinforced water line and internal pocket radius toward the rear of the trigger 
Please Note: Manufacturers warranty will be void if:
Seal is broken — DO NOT tighten the castle nut — Castle nut is factory torqued with a special plastic indicator seal in it.
Installed on a pistol upper — Lower CANNOT be used to build an AR pistol.