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Excellent custom upper, universal fit
This F-1 upper is designed for universal fit on any mil-spec lower. I've put it on a Spikes, Noveske, & Aero Precision lower with perfect fit. The only "mod" you my need is the bolt release. It will not fit a large paddle bolt release like the Seekins. The machining on this is perfect with no burrs or machine marks.
Pros:
- Universal fit
- Precision machining, finished well, functions flawlessly
Cons:
- expensive - but worth it
Best Used for:
- Custom AR Build
Would recommend: Yes
Very custom shaped Upper. Prepare for fit issues.
The Upper receiver is light and looks great. However it did not fit well with my Anderson Lower or my Stinger Hand Guard. This is part is designed to work with F-1 parts and it has a unique shape that did not work with the milspec parts I had without more modification than I wanted.
Pros:
- Quality & Craftsmanship
- Light & durable
Cons:
- Non-standard shape
- Custom fit is not compatible with some parts
Best Used for:
- Building a full set from the same manufacturer
Would recommend: No
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