FFL Required Before Shipping. Please have your dealer email a copy of their FFL to FFL@rainierarms.com or fax it to 253-218-2998, referencing your name and order number.
Rainier Arms forged lower receiver is made from 7075 aluminum. The best anodizing dies are used for a deep black finish. Features an upper to lower tensioning screw and a flared out magwell for quick mag changes.
We offer two engraving options that indicates where our lower receiver is based out of:
Review by Keith R. on 19 Sep 2024review stating The fit and finish was
The fit and finish was excellent. The value of the lower was the deciding factor to purchase. Lower parts kit was installed without issue. I would purchase this lower again.
Review by Alex G. on 1 Sep 2024review stating Perfect Fit and Finish
Purchased because it's not polluted with large logos and branding -- I like the low profile look. The finish is great and matches the Rainier Arms Forged Upper well. My lower did not come with a lower-upper tension screw, but the lower and upper have zero play or wobble or gap. It's a tight fight. Depending on your OCD, the lower-upper are +/- wit...Read MoreRead more about Purchased because it's not polluted
h their machining lines -- it's barely noticeable, however; you'd have to actively be looking for such a "flaw". No regrets. I would purchase again and highly recommend. If I could post pics, I would. Read LessRead less about Purchased because it's not polluted
Review by Keith R. on 19 Sep 2024review stating The fit and finish was
The fit and finish was excellent. The value of the lower was the deciding factor to purchase. Lower parts kit was installed without issue. I would purchase this lower again.
Review by Alex G. on 1 Sep 2024review stating Perfect Fit and Finish
Purchased because it's not polluted with large logos and branding -- I like the low profile look. The finish is great and matches the Rainier Arms Forged Upper well. My lower did not come with a lower-upper tension screw, but the lower and upper have zero play or wobble or gap. It's a tight fight. Depending on your OCD, the lower-upper are +/- wit...Read MoreRead more about Purchased because it's not polluted
h their machining lines -- it's barely noticeable, however; you'd have to actively be looking for such a "flaw". No regrets. I would purchase again and highly recommend. If I could post pics, I would. Read LessRead less about Purchased because it's not polluted
