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Gunsmith Service/ Assembly: Lower

Assembly: Lower

Availability: In stock




Rainier Arms Custom

Professional build out of your AR15 / 308 lower receiver. Including, trigger adjustment of match triggers, proper staking of castle nuts, etc.

Build out with adjustment of Match Triggers; like Geissele, Mega, JP is extra.



Additional Info

Additional Info

Manufacturer No
Finish No
Barrel Length No
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


Customer Reviews (2)

No commentReview by
Got to shoot the lower today. I worked flawlessly. Very happy with the way it looks and shoots. The only issue I have is the picture of the lower that you have on your website is different than the lower that I got. The CMT ambi lower I got has a magazine release that is flared with the contour of the trigger guard, much like the San-Tan Tactical ambi lower. The picture shows it having a round mag release. It's not the end of the world, but the reason I went with the CMT lower is that aesthetically I didn't care for the flared mag release. I would recommend updating the picture you use for the CMT ambi lower. Other than that everything was great. Thanks.
(Posted on 10/20/2016)
Quality Work at a fair priceReview by
As I have not seen any reviews of Rainier's gunsmithing, at least services that I have used, I thought I would provide some feedback. I recently received the second lower that I have had Rainier assemble for me back and I am very impressed with their attention to detail and the quality of their work. I even received a note from the gunsmith who was assembling my lower that the center drum of my BAD safety was not functioning correctly so he switched out the center drum and fixed the issue at no cost to me. I will continue to trust Rainier Arms for all of my AR gunsmithing, they are a professional bunch and do great work. (Posted on 3/6/2016)

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