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Posted: 7/20/2022 4:45:13 PM EDT
[Last Edit: far_right][Edited]
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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 |
Dan_Gray: You're right
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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. |
Dan_Gray: You're right
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Originally 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. Originally 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. |
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Originally 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? |
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| 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. |
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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? 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! |
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