Rainier Arms UltraMatch Billet Lower Receiver
Our billet sets are CNC machined from solid billet 7075-T6 aluminum which is 70% stronger than the commonly used 6061 aluminum and finished with milspec hardcoat anodize to a surface hardness of 60 Rockwell. We have designed our lowers with an ambidextrous mag release and bolt release with extended latch for smoother deployment. The precision machining on our billets lowers will line up perfectly to our Rainier Arms UltraMatch Billet Upper Receiver or any other billet uppers out there.
- Ambidextrous Extended Bolt Release
- Ambidextrous Magazine Release
- 7075 Billet Aluminum
- Flared Magwell
- Integrated Trigger Guard
- Tensioning Screw for proper Upper/Lower Fit
- Compatible with 45° safety selector levers
FFL Required Before Shipping.
Please have your dealer email their license to FFL@rainierarms.com or they can also fax it in. Please give us a few days to process the information.
|SKU||RA105 MOD 3|
|Manufacturer||Rainier Arms, LLC|
Customer Reviews (8)
- No commentReview by John
- Excellent, Will buy more soon!Review by Justin
I love it, and will build another on this lower soon. (Posted on 7/28/2016)
- compatibility Review by Patrick
Had some fitment issues with certain KNS anti-roll pin kits hitting the raised machining for the ambi bolt release button. Go small if you are going to use roll pins.
Also, when fully collapsed, the right side guide rod on my Maxim CQB stock comes in contact with the ambi bolt release button. I have to depress it and slide the rod over the recessed button to completely collapse.
In all, I expected to exchange functionality in areas with buying an ambi lower, so it evenly trades out for me.
(Posted on 7/15/2016)
- No commentReview by Cong
- Can't wait!Review by Brian
- No commentReview by Jared
- No commentReview by Scott
Cons: Price - premium price for premium product. But >$200 is a hard pill to swallow for one lower when standard forged lowers can be had for ~$50; Bolt catch release button works only one-way - it will release the bolt if it's locked to the rear, but will not catch the bolt if pressed while the bolt is brought back. You will still have to use the left-side control to lock back the bolt without an empty mag in the gun. I knew this when I bought the lower but thought it was an important distinction for those who may not realize it. (Posted on 5/28/2016)
- No commentReview by Nick