Ozzistraightshooter Chamber Headspace Gauge set for

300 BLACKOUT Rifles.

Precision 300 Blackout chamber head-space gauge set. Made to CIP European standard dimensions. Set includes GO gauge and NO-GO gauge. With these tools you can check the chamber headspace.  These are top quality tools designed for professional use.Should only be used by a professional Gunsmith. Made in Serbia from German Bohler S705 steel.