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Uploaded by johntitsworthjr on Oct 29, 2010
This is a working prototype of a 556 (223 Remington) upper for a 308 style (AR10) lower. Takes a mag block. This upper is a side charging version. Visit www.xcaliberfirearms.com
Science & Technology
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@RowdyFisk yes.
MrCarrothead86 1 year ago
interesting - thanks for posting.
Does it use standard AR15 barrels?
RowdyFisk 1 year ago
looking trim there john!
delta9mda 1 year ago
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@RowdyFisk yes.
MrCarrothead86 1 year ago
interesting - thanks for posting.
Does it use standard AR15 barrels?
RowdyFisk 1 year ago
looking trim there john!
delta9mda 1 year ago