NERF Ultra AMP/FOCUS Integrated BCAR for Kuryaka's Short Dart Single Stage Conversion Kit

prusaprinters

This BCAR is only designed to be used after mod'ing your Ultra AMP/FOCUS with Kuryaka's Single Stage Short Dart Conversion kit.I have designed this BCAR to be a simple drop-in (NO SHELL CUTTING). This BCAR fills all of the empty space in the original muzzle/barrel adding much needed accuracy.BCAR Specs(3) rows of 4 bearings in an 8 degree helical twist12.6 Dia CrushFlanges of bearing must be on the bottom (as seen in the pictures)Hardware Required:(12) F682ZZ Flanged Bearings (2mm ID x 6.1mm Flange OD x 2.3mm High)(12) 2mm OD x 14mm Long Dowel PinsVersion Mk1.0 has a .520 bore throughout the BCAR (also a skeletonized version)Version Mk1.1 has a larger .550 Bore if you feel the darts are rubbingTesting:With a single stage 40mm Daybrake cage & wheels, using OOD Kraken (3s), Worker HE+, w/ the Mk1.0 (.520 Bore) BCAR installed I Chono'd60 shot average FPS = 153.6Highest FPS = 167Lowest FPS = 137Standard Deviation = 6.9When I have time I will print the Mk1.1 with the larger .550 Bore to see if this helps FPS. If no then I will try and see if opening the crush to 12.8 will boost FPS and keep the accuracy of the Mk1.0.Please leave comments, and let me know if there are things I could do to improve form or function. And upload pics of your prints/builds and any remixes!