https://www.brownells.com/rifle-part...prod97909.aspx
I'm not sure about the feed ramps.
Other option
https://retrorifles.com/colt-m16a1-model-603-1967-1983/
Last edited by ryanm; 06-23-19 at 19:56.
If you can consider a regular barrel extension, the barrel you seek is more available. M4 barrel extension is completely unnecessary with a 20” barrel and rifle lower.
RLTW
“What’s New” button, but without GD: https://www.m4carbine.net/search.php...new&exclude=60 , courtesy of ST911.
Disclosure: I am affiliated PRN with a tactical training center, but I speak only for myself. I have no idea what we sell, other than CLP and training. I receive no income from sale of hard goods.
I understood what you meant from the start. It's really not that hard. I've been wanting this exact thing for years and have not found anything off the shelf, as you have probably also found to be the case. You might be stuck modifying something close. I have a 20" from www.ar15performance.com that's really good. They might have something you can tweak. Criterion has a 20" that's close. Otherwise, AR15barrels.com might be still making custom barrels, I'm not sure.
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