The RL556v3™ features Polymer80’s proprietary polymer composite, a solid core design, flared magwell, and heavier mil-spec buffer tube housing. The pistol grip area features a unique threadless design specific to Polymer80 rifle lowers.
Review by Jim M. on 5 Sep 2021review stating Excellent Product
Very sturdy and easy to finish out. Jig and tooling worked well. Good fit to my Aero mill spec upper with minimum adjustment. I would recommend this product and, liked it so well I bought a second one. Good service and quick shipping from Rainier.
Review by Drew K. on 29 Aug 2021review stating Great Shipping
I haven’t done anything with it yet but I can say Rainer Arms delivered it to my house on the other side of the country, in a timely fashion and I received my product in perfect condition! This will be my first 80 lower build so I hope I finish it turns out like it’s supposed to.
Second Purchase - First one was flawless but for operator error on construction...
Review by James T. on 28 Aug 2021review stating Second Purchase - First one was flawless but for operator error on construction...
Second time to purchase this lower - building a very light weight setup - my previous lower worked well but for my bo-boo which made the safety very stiff. nothing that was wrong with the quality, durability, fit or finish. Ran easily 2-3K rounds through it without any issues. All in, the setup is less than 5.5lbs and very fun to shoot...
Review by Jim M. on 5 Sep 2021review stating Excellent Product
Very sturdy and easy to finish out. Jig and tooling worked well. Good fit to my Aero mill spec upper with minimum adjustment. I would recommend this product and, liked it so well I bought a second one. Good service and quick shipping from Rainier.
Review by Drew K. on 29 Aug 2021review stating Great Shipping
I haven’t done anything with it yet but I can say Rainer Arms delivered it to my house on the other side of the country, in a timely fashion and I received my product in perfect condition! This will be my first 80 lower build so I hope I finish it turns out like it’s supposed to.
Second Purchase - First one was flawless but for operator error on construction...
Review by James T. on 28 Aug 2021review stating Second Purchase - First one was flawless but for operator error on construction...
Second time to purchase this lower - building a very light weight setup - my previous lower worked well but for my bo-boo which made the safety very stiff. nothing that was wrong with the quality, durability, fit or finish. Ran easily 2-3K rounds through it without any issues. All in, the setup is less than 5.5lbs and very fun to shoot...
