User Panel
User Panel
User Panel
|
Posted: 7/20/2022 4:45:13 PM EDT
[Last Edit: far_right]
I have a Sendra RR that is giving me some upper fitment issues.
I have specifically bought two uppers that wont work: PWS (awesome upper and CS though) and an Aero M4E1. These were purchased with the RR in mind. Ive got others that fit ok to tight but fine: Coltx2, BCM, CMMG, Sabre Defense, Stag. There was a thread about undersized pins, and i couldnt find the thread, but i found some that were 0.1" under. That doesnt seem like it would help much. The lower looks to be re-worked (anodized) in the past but im not positive about it. Somewhat frustrating when most work and then i buy two uppers just for this gun and neither work.   Attached File |
|
|
|
|
Posted: 7/20/2022 4:53:09 PM EDT
[#1]
My lower was reworked by us anodizing before I bought it. You might send it to them to get it brought in spec.
Where is it having clearance issues? Do the two uppers that don't fit work on all your semi auto lowers? |
|
|
|
|
Posted: 7/20/2022 5:02:59 PM EDT
[#2]
Quote HistoryOriginally Posted By jaqufrost: My lower was reworked by us anodizing before I bought it. You might send it to them to get it brought in spec. Where is it having clearance issues? Do the two uppers that don't fit work on all your semi auto lowers? Ive considered US Anodizing. I just hate to mail a 25k gun. It scares me.  All clearance issues seem to be at the rear lug. The Aero is VERY tight and the PWS just wont latch. I thought I had a picture, but couldnt find it. |
|
|
|
|
Posted: 7/20/2022 5:10:08 PM EDT
[#3]
Is it not able to pivot low enough or is it a front to rear offset?
|
|
|
|
|
Posted: 7/20/2022 5:24:55 PM EDT
[#4]
Quote HistoryOriginally Posted By far_right: Ive considered US Anodizing. I just hate to mail a 25k gun. It scares me. All clearance issues seem to be at the rear lug. The Aero is VERY tight and the PWS just wont latch. I thought I had a picture, but couldnt find it. Quote HistoryOriginally Posted By far_right: Originally Posted By jaqufrost: My lower was reworked by us anodizing before I bought it. You might send it to them to get it brought in spec. Where is it having clearance issues? Do the two uppers that don't fit work on all your semi auto lowers? Ive considered US Anodizing. I just hate to mail a 25k gun. It scares me. All clearance issues seem to be at the rear lug. The Aero is VERY tight and the PWS just wont latch. I thought I had a picture, but couldnt find it. Just insure it. You invested 25k, midas well drop a few bucks more for an as in spec as possible gun. |
|
|
|
|
Posted: 7/20/2022 5:37:32 PM EDT
[#5]
Quote HistoryOriginally Posted By jaqufrost: Is it not able to pivot low enough or is it a front to rear offset? Wont pivot low enough |
|
|
|
|
Posted: 7/20/2022 5:45:34 PM EDT
[#6]
I would send it to US Anodizing so they can check the top deck.
|
|
|
|
LA, USA
|
Posted: 7/20/2022 7:29:08 PM EDT
[Last Edit: cajun22]
[#7]
It's probable the radius in front of the stock extension. That's where Victor had to take some off to get the uppers to fit. OLY/Frankford Arsenal lower. All uppers fit now.
You can see in this pic where he shaved it down to fit.  " />
|
|
|
|
Posted: 7/20/2022 8:30:10 PM EDT
[#8]
Quote HistoryOriginally Posted By cajun22: It's probable the radius in front of the stock extension. Prussian Blue to see where the contact is, considering the value of the lower? |
|
|
|
|
Posted: 7/21/2022 8:51:37 AM EDT
[#9]
I'd use Dykem blue first to see contact/rub points are at.
|
|
|
|
|
Posted: 7/21/2022 10:48:13 AM EDT
[#10]
Quote HistoryOriginally Posted By Ryo: I'd use Dykem blue first to see contact/rub points are at. Good idea. Thanks. |
|
|
|
|
Posted: 7/25/2022 2:55:07 PM EDT
[Last Edit: bruh44]
[#11]
I’ve got a Sendra. I had several uppers that didn’t fit well at first. I used a rubber mallet to get them in. I was pretty easy with it though. After having done that for a year or so, all my uppers started fitting. If it’s real tight, I wouldn’t recommend that though because you could definitely damage the lower. I didn’t have any pin alignment issues though.
|
|
|
|
|
Posted: 8/2/2022 12:30:52 PM EDT
[#12]
Quote HistoryOriginally Posted By jaqufrost: My lower was reworked by us anodizing before I bought it. You might send it to them to get it brought in spec. Where is it having clearance issues? Do the two uppers that don't fit work on all your semi auto lowers? Second usanodizing. They did a great job on my Olympic RR. Needed a damn rubber mallet to close uppers on it not everything fits on it perfectly. The anodizing is also top notch, looks brand new! |
|
|
|
Win a FREE Membership!
Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. One new winner* is announced every week!
You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers.
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
