A brass butt cap or a duralumin butt cap can be ordered rounded and it is not considered a "chargeable" option. The butt cap itself is, in many cases, but not the rounding.
That does not mean you can change a butt cap to "domed" or "flanged" or "scalloped" in the same manner. I hope this helps. Best, Capt. Chris
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Capt.Chris Stanaback
RKCC/RKCA Founder
RKS #016
NRA Lifetime Member
CAPTSTANABACK@aol.com
WEBSITE: www.captstanaback.com