SBR: Springfield Armory SAINT, 300AAC, 9" Barrel, Overall Length 27.75in, Add Surefire SOCOM SOCOM762-MINI2 Overall Length = 31.75". I have been studying the addition of Brownell's' AR-15 CTR STOCK COLLAPSIBLE MIL-SPEC W/ FOLDING STOCK ADAPTER which would shorten everything by 6.2"; but when comes time to fire will have to swing the stock out.
Adding suppressors always is a trade-off for how short the system will be configured.
As expected, the ATF lied about SBR approval times; they claim 30-days, the average time is now 100 days. For suppressor approval averages 235 days with ATF claiming 90 days. However, they will cash your $200 tax fee within 5 business days!