I am assembling a basic M4 using parts from BCM, Spikes, FN, Colt and JP. The lower will be an 80% lower that I will complete. A franken gun, but quality pieces. Part of that is having the components to build a BCG.
This includes:
- JP enhanced bolt
- BCM gas key, firing pin, cam pin, retaining pin and extractor spring upgrade kit
- Colt carrier
I also bought this gas key staking tool from Brownells. https://www.brownells.com/gunsmith-t...prod29337.aspx
I guess what I am looking for is feedback on anything that I should pay attention to in assembling and/or any problems I may encounter when I actually run it in the gun
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